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ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#558475	#9182. Infinite Race	ucup-team004	100 ✓	14ms	4748kb	C++20	751b	2024-09-11 16:21:30	2024-09-11 16:21:30

Judging History

你现在查看的是最新测评结果

[2024-09-11 16:21:30]
评测

测评结果：100
用时：14ms
内存：4748kb

查看

[2024-09-11 16:21:30]
提交

answer

#include <bits/stdc++.h>

using i64 = long long;
using u64 = unsigned long long;
using u32 = unsigned;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int N, Q;
    std::cin >> N >> Q;
    
    std::vector<int> f(N, 1), t(N, 0);
    int all = 0;
    
    int ans = 0;
    for (int i = 1; i <= Q; i++) {
        int x;
        std::cin >> x;
        
        if (x > 0) {
            if (t[x] >= all && f[x] == 0) {
                ans++;
                all = i;
            }
            t[x] = i;
            f[x] = 0;
        } else {
            x = -x;
            t[x] = i;
            f[x] = 1;
        }
    }
    
    std::cout << ans << "\n";
    
    return 0;
}

Source code, Language: C++20

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 29

Accepted

Test #1:

score: 29

Accepted

time: 0ms

memory: 3528kb

input:

2
1
1

output:

result:

ok single line: '0'

Test #2:

score: 29

Accepted

time: 0ms

memory: 3604kb

input:

output:

result:

ok single line: '0'

Test #3:

score: 29

Accepted

time: 0ms

memory: 3612kb

input:

2
5
-1
-1
-1
-1
1

output:

result:

ok single line: '0'

Test #4:

score: 29

Accepted

time: 8ms

memory: 3608kb

input:

2
200000
1
1
-1
-1
-1
1
-1
1
1
1
-1
-1
1
-1
1
1
-1
1
1
-1
-1
1
-1
-1
1
-1
1
-1
1
1
1
1
-1
1
-1
-1
-1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
1
-1
-1
-1
-1
-1
1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
1
-1
-1
-1
1
-1
1
-1
1
-1
-1
1
-1
1
1
-1
1
-1
1
-1
1
-1
1
-1
-1
-1
-1
-1
1
-1
-1
1
1
1
1
1
1
-1
-1
-...

output:

result:

ok single line: '50154'

Test #5:

score: 29

Accepted

time: 8ms

memory: 3700kb

input:

2
200000
1
-1
1
-1
1
1
-1
1
-1
-1
1
-1
1
1
1
1
-1
-1
1
1
1
1
-1
1
-1
1
1
1
-1
-1
1
-1
-1
-1
1
1
1
1
-1
1
1
1
-1
1
1
1
-1
1
1
1
-1
1
1
1
1
1
1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
-1
-1
-1
1
-1
-1
-1
-1
1
1
1
1
-1
-1
-1
1
-1
-1
-1
-1
1
-1
-1
1
-1
1
1
-1
-1
-1
1
-1
-1
-1
-1
-1
-1
1
1
-1
-1
-1
1
-1
1
1
-1
-1
1...

output:

result:

ok single line: '50172'

Test #6:

score: 29

Accepted

time: 8ms

memory: 3480kb

input:

output:

result:

ok single line: '49713'

Test #7:

score: 29

Accepted

time: 8ms

memory: 3812kb

input:

output:

result:

ok single line: '49564'

Test #8:

score: 29

Accepted

time: 0ms

memory: 3476kb

input:

2
100
-1
1
-1
1
-1
-1
-1
-1
1
-1
-1
-1
1
-1
-1
-1
1
-1
-1
1
1
1
1
1
1
1
-1
-1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
-1
1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
-1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
-1
-1
-1
1
1
1
-1
1
1
1
-1
1
-1
1
1
-1
1
-1
-1
-1
-1

output:

result:

ok single line: '16'

Test #9:

score: 29

Accepted

time: 0ms

memory: 3540kb

input:

output:

result:

ok single line: '1'

Test #10:

score: 29

Accepted

time: 6ms

memory: 3484kb

input:

output:

result:

ok single line: '199999'

Test #11:

score: 29

Accepted

time: 0ms

memory: 3592kb

input:

output:

result:

ok single line: '99'

Test #12:

score: 29

Accepted

time: 0ms

memory: 3828kb

input:

2
200000
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-1
1
-...

output:

result:

ok single line: '0'

Test #13:

score: 29

Accepted

time: 0ms

memory: 3612kb

input:

output:

result:

ok single line: '0'

Test #14:

score: 29

Accepted

time: 8ms

memory: 3748kb

input:

output:

result:

ok single line: '50402'

Test #15:

score: 29

Accepted

time: 0ms

memory: 3780kb

input:

output:

result:

ok single line: '27'

Test #16:

score: 29

Accepted

time: 4ms

memory: 3784kb

input:

output:

result:

ok single line: '49885'

Test #17:

score: 29

Accepted

time: 0ms

memory: 3548kb

input:

output:

result:

ok single line: '84'

Test #18:

score: 29

Accepted

time: 6ms

memory: 3544kb

input:

output:

result:

ok single line: '199987'

Test #19:

score: 29

Accepted

time: 0ms

memory: 3608kb

input:

output:

result:

ok single line: '3'

Test #20:

score: 29

Accepted

time: 0ms

memory: 3816kb

input:

output:

result:

ok single line: '0'

Subtask #2:

score: 34

Accepted

Test #21:

score: 34

Accepted

time: 0ms

memory: 3780kb

input:

output:

result:

ok single line: '1'

Test #22:

score: 34

Accepted

time: 6ms

memory: 3592kb

input:

output:

result:

ok single line: '199999'

Test #23:

score: 34

Accepted

time: 0ms

memory: 3544kb

input:

output:

result:

ok single line: '99'

Test #24:

score: 34

Accepted

time: 0ms

memory: 3520kb

input:

output:

result:

ok single line: '1'

Test #25:

score: 34

Accepted

time: 6ms

memory: 4600kb

input:

output:

result:

ok single line: '1'

Test #26:

score: 34

Accepted

time: 1ms

memory: 4564kb

input:

200000
1
182487

output:

result:

ok single line: '0'

Test #27:

score: 34

Accepted

time: 3ms

memory: 3756kb

input:

output:

result:

ok single line: '133415'

Test #28:

score: 34

Accepted

time: 6ms

memory: 3792kb

input:

output:

result:

ok single line: '105734'

Test #29:

score: 34

Accepted

time: 6ms

memory: 3604kb

input:

output:

result:

ok single line: '57864'

Test #30:

score: 34

Accepted

time: 8ms

memory: 3596kb

input:

output:

result:

ok single line: '31054'

Test #31:

score: 34

Accepted

time: 8ms

memory: 3592kb

input:

output:

result:

ok single line: '11485'

Test #32:

score: 34

Accepted

time: 9ms

memory: 3860kb

input:

output:

result:

ok single line: '2483'

Test #33:

score: 34

Accepted

time: 10ms

memory: 3632kb

input:

output:

result:

ok single line: '708'

Test #34:

score: 34

Accepted

time: 10ms

memory: 4628kb

input:

output:

result:

ok single line: '355'

Test #35:

score: 34

Accepted

time: 12ms

memory: 4700kb

input:

output:

result:

ok single line: '353'

Test #36:

score: 34

Accepted

time: 12ms

memory: 4620kb

input:

output:

result:

ok single line: '371'

Test #37:

score: 34

Accepted

time: 0ms

memory: 3552kb

input:

output:

result:

ok single line: '7'

Test #38:

score: 34

Accepted

time: 0ms

memory: 3616kb

input:

output:

result:

ok single line: '46'

Test #39:

score: 34

Accepted

time: 7ms

memory: 4688kb

input:

output:

result:

ok single line: '95191'

Test #40:

score: 34

Accepted

time: 0ms

memory: 3588kb

input:

output:

result:

ok single line: '45'

Test #41:

score: 34

Accepted

time: 11ms

memory: 4688kb

input:

output:

result:

ok single line: '99995'

Test #42:

score: 34

Accepted

time: 0ms

memory: 3480kb

input:

output:

result:

ok single line: '3'

Test #43:

score: 34

Accepted

time: 0ms

memory: 4620kb

input:

output:

result:

ok single line: '3'

Test #44:

score: 34

Accepted

time: 0ms

memory: 3544kb

input:

output:

result:

ok single line: '3'

Subtask #3:

score: 22

Accepted

Test #45:

score: 22

Accepted

time: 0ms

memory: 3524kb

input:

2
1
1

output:

result:

ok single line: '0'

Test #46:

score: 22

Accepted

time: 0ms

memory: 3528kb

input:

output:

result:

ok single line: '0'

Test #47:

score: 22

Accepted

time: 0ms

memory: 3548kb

input:

2
5
-1
-1
-1
-1
1

output:

result:

ok single line: '0'

Test #48:

score: 22

Accepted

time: 0ms

memory: 3616kb

input:

2
100
-1
1
-1
1
-1
-1
-1
-1
1
-1
-1
-1
1
-1
-1
-1
1
-1
-1
1
1
1
1
1
1
1
-1
-1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
-1
1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
-1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
-1
-1
-1
1
1
1
-1
1
1
1
-1
1
-1
1
1
-1
1
-1
-1
-1
-1

output:

result:

ok single line: '16'

Test #49:

score: 22

Accepted

time: 0ms

memory: 3824kb

input:

output:

result:

ok single line: '1'

Test #50:

score: 22

Accepted

time: 0ms

memory: 3608kb

input:

output:

result:

ok single line: '99'

Test #51:

score: 22

Accepted

time: 0ms

memory: 3748kb

input:

output:

result:

ok single line: '0'

Test #52:

score: 22

Accepted

time: 0ms

memory: 3520kb

input:

output:

result:

ok single line: '27'

Test #53:

score: 22

Accepted

time: 0ms

memory: 3616kb

input:

output:

result:

ok single line: '84'

Test #54:

score: 22

Accepted

time: 0ms

memory: 3744kb

input:

output:

result:

ok single line: '1'

Test #55:

score: 22

Accepted

time: 0ms

memory: 3828kb

input:

output:

result:

ok single line: '7'

Test #56:

score: 22

Accepted

time: 0ms

memory: 3772kb

input:

output:

result:

ok single line: '46'

Test #57:

score: 22

Accepted

time: 0ms

memory: 3520kb

input:

output:

result:

ok single line: '45'

Test #58:

score: 22

Accepted

time: 0ms

memory: 3616kb

input:

output:

result:

ok single line: '4'

Test #59:

score: 22

Accepted

time: 0ms

memory: 3480kb

input:

output:

result:

ok single line: '3'

Test #60:

score: 22

Accepted

time: 0ms

memory: 3812kb

input:

100
100
-99
-63
-4
-16
-7
-49
-41
-55
-70
-11
-65
-42
-98
-85
-25
-52
-30
-72
98
-79
99
70
-73
-53
-93
-46
-2
-19
19
2
4
-59
-90
-82
90
-40
-18
-34
-4
-87
85
82
46
-67
-36
-19
52
-35
-37
-31
-96
49
-28
-15
-99
-52
-71
-88
-95
-90
-12
37
72
19
-2
-94
-85
-54
-20
11
88
25
96
-43
-83
-48
7
-25
59
95
-9...

output:

result:

ok single line: '0'

Test #61:

score: 22

Accepted

time: 0ms

memory: 3824kb

input:

output:

result:

ok single line: '0'

Test #62:

score: 22

Accepted

time: 0ms

memory: 3596kb

input:

output:

result:

ok single line: '21'

Test #63:

score: 22

Accepted

time: 0ms

memory: 3748kb

input:

100
100
-45
-68
-7
-1
-82
-22
-89
-7
-20
-50
-38
-79
-9
-87
-11
-35
-61
-45
-24
-95
-43
-39
-81
-92
-62
-81
-70
-91
-7
-73
-45
-26
-22
-76
-27
-46
-51
-42
-17
-11
-11
-95
-50
-79
-18
-34
-56
-3
-21
-93
-71
-49
-51
-7
-75
-84
-65
-25
-17
-56
-43
-17
-88
-29
-44
-60
-41
-80
-78
-30
-78
-96
-46
-82
-31...

output:

result:

ok single line: '0'

Test #64:

score: 22

Accepted

time: 0ms

memory: 3784kb

input:

output:

result:

ok single line: '45'

Test #65:

score: 22

Accepted

time: 0ms

memory: 3544kb

input:

output:

result:

ok single line: '1'

Test #66:

score: 22

Accepted

time: 0ms

memory: 3816kb

input:

output:

result:

ok single line: '3'

Test #67:

score: 22

Accepted

time: 0ms

memory: 3516kb

input:

output:

result:

ok single line: '0'

Test #68:

score: 22

Accepted

time: 0ms

memory: 3616kb

input:

output:

result:

ok single line: '3'

Subtask #4:

score: 15

Accepted

Dependency #1:

100%

Accepted

Dependency #2:

100%

Accepted

Dependency #3:

100%

Accepted

Test #69:

score: 15

Accepted

time: 0ms

memory: 3524kb

input:

2
1
1

output:

result:

ok single line: '0'

Test #70:

score: 15

Accepted

time: 0ms

memory: 3608kb

input:

output:

result:

ok single line: '0'

Test #71:

score: 15

Accepted

time: 0ms

memory: 3824kb

input:

2
5
-1
-1
-1
-1
1

output:

result:

ok single line: '0'

Test #72:

score: 15

Accepted

time: 8ms

memory: 3556kb

input:

2
200000
1
1
-1
-1
-1
1
-1
1
1
1
-1
-1
1
-1
1
1
-1
1
1
-1
-1
1
-1
-1
1
-1
1
-1
1
1
1
1
-1
1
-1
-1
-1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
1
-1
-1
-1
-1
-1
1
-1
-1
1
1
1
-1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
1
-1
-1
-1
1
-1
1
-1
1
-1
-1
1
-1
1
1
-1
1
-1
1
-1
1
-1
1
-1
-1
-1
-1
-1
1
-1
-1
1
1
1
1
1
1
-1
-1
-...

output:

result:

ok single line: '50154'

Test #73:

score: 15

Accepted

time: 7ms

memory: 3824kb

input:

2
200000
1
-1
1
-1
1
1
-1
1
-1
-1
1
-1
1
1
1
1
-1
-1
1
1
1
1
-1
1
-1
1
1
1
-1
-1
1
-1
-1
-1
1
1
1
1
-1
1
1
1
-1
1
1
1
-1
1
1
1
-1
1
1
1
1
1
1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
-1
-1
-1
1
-1
-1
-1
-1
1
1
1
1
-1
-1
-1
1
-1
-1
-1
-1
1
-1
-1
1
-1
1
1
-1
-1
-1
1
-1
-1
-1
-1
-1
-1
1
1
-1
-1
-1
1
-1
1
1
-1
-1
1...

output:

result:

ok single line: '50172'

Test #74:

score: 15

Accepted

time: 8ms

memory: 3604kb

input:

output:

result:

ok single line: '49713'

Test #75:

score: 15

Accepted

time: 8ms

memory: 3592kb

input:

output:

result:

ok single line: '49564'

Test #76:

score: 15

Accepted

time: 0ms

memory: 3528kb

input:

2
100
-1
1
-1
1
-1
-1
-1
-1
1
-1
-1
-1
1
-1
-1
-1
1
-1
-1
1
1
1
1
1
1
1
-1
-1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
-1
1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
-1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
-1
-1
1
-1
-1
1
1
-1
-1
-1
1
-1
-1
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1
1
1
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1
1
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1
-1
1
1
-1
1
-1
-1
-1
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output:

result:

ok single line: '16'

Test #77:

score: 15

Accepted

time: 0ms

memory: 3588kb

input:

output:

result:

ok single line: '1'

Test #78:

score: 15

Accepted

time: 6ms

memory: 3540kb

input:

output:

result:

ok single line: '199999'

Test #79:

score: 15

Accepted

time: 0ms

memory: 3780kb

input:

output:

result:

ok single line: '99'

Test #80:

score: 15

Accepted

time: 6ms

memory: 3788kb

input:

2
200000
-1
1
-1
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1
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1
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output:

result:

ok single line: '0'

Test #81:

score: 15

Accepted

time: 0ms

memory: 3620kb

input:

output:

result:

ok single line: '0'

Test #82:

score: 15

Accepted

time: 4ms

memory: 3532kb

input:

output:

result:

ok single line: '50402'

Test #83:

score: 15

Accepted

time: 0ms

memory: 3516kb

input:

output:

result:

ok single line: '27'

Test #84:

score: 15

Accepted

time: 8ms

memory: 3520kb

input:

output:

result:

ok single line: '49885'

Test #85:

score: 15

Accepted

time: 0ms

memory: 3528kb

input:

output:

result:

ok single line: '84'

Test #86:

score: 15

Accepted

time: 6ms

memory: 3524kb

input:

output:

result:

ok single line: '199987'

Test #87:

score: 15

Accepted

time: 0ms

memory: 3596kb

input:

output:

result:

ok single line: '1'

Test #88:

score: 15

Accepted

time: 9ms

memory: 4672kb

input:

output:

result:

ok single line: '1'

Test #89:

score: 15

Accepted

time: 1ms

memory: 4680kb

input:

200000
1
182487

output:

result:

ok single line: '0'

Test #90:

score: 15

Accepted

time: 6ms

memory: 3516kb

input:

output:

result:

ok single line: '133415'

Test #91:

score: 15

Accepted

time: 6ms

memory: 3484kb

input:

output:

result:

ok single line: '105734'

Test #92:

score: 15

Accepted

time: 6ms

memory: 3464kb

input:

output:

result:

ok single line: '57864'

Test #93:

score: 15

Accepted

time: 7ms

memory: 3784kb

input:

output:

result:

ok single line: '31054'

Test #94:

score: 15

Accepted

time: 8ms

memory: 3752kb

input:

output:

result:

ok single line: '11485'

Test #95:

score: 15

Accepted

time: 8ms

memory: 3592kb

input:

output:

result:

ok single line: '2483'

Test #96:

score: 15

Accepted

time: 9ms

memory: 3548kb

input:

output:

result:

ok single line: '708'

Test #97:

score: 15

Accepted

time: 6ms

memory: 4608kb

input:

output:

result:

ok single line: '355'

Test #98:

score: 15

Accepted

time: 13ms

memory: 4748kb

input:

output:

result:

ok single line: '353'

Test #99:

score: 15

Accepted

time: 8ms

memory: 4592kb

input:

output:

result:

ok single line: '371'

Test #100:

score: 15

Accepted

time: 0ms

memory: 3812kb

input:

output:

result:

ok single line: '7'

Test #101:

score: 15

Accepted

time: 0ms

memory: 3592kb

input:

output:

result:

ok single line: '46'

Test #102:

score: 15

Accepted

time: 11ms

memory: 4676kb

input:

output:

result:

ok single line: '95191'

Test #103:

score: 15

Accepted

time: 0ms

memory: 3524kb

input:

output:

result:

ok single line: '45'

Test #104:

score: 15

Accepted

time: 7ms

memory: 4616kb

input:

output:

result:

ok single line: '99995'

Test #105:

score: 15

Accepted

time: 0ms

memory: 3520kb

input:

output:

result:

ok single line: '4'

Test #106:

score: 15

Accepted

time: 0ms

memory: 3752kb

input:

output:

result:

ok single line: '3'

Test #107:

score: 15

Accepted

time: 0ms

memory: 3596kb

input:

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-9...

output:

result:

ok single line: '0'

Test #108:

score: 15

Accepted

time: 0ms

memory: 3812kb

input:

output:

result:

ok single line: '0'

Test #109:

score: 15

Accepted

time: 0ms

memory: 3620kb

input:

output:

result:

ok single line: '21'

Test #110:

score: 15

Accepted

time: 0ms

memory: 3784kb

input:

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100
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output:

result:

ok single line: '0'

Test #111:

score: 15

Accepted

time: 0ms

memory: 3824kb

input:

output:

result:

ok single line: '45'

Test #112:

score: 15

Accepted

time: 13ms

memory: 4692kb

input:

output:

result:

ok single line: '0'

Test #113:

score: 15

Accepted

time: 11ms

memory: 3828kb

input:

output:

result:

ok single line: '0'

Test #114:

score: 15

Accepted

time: 11ms

memory: 4572kb

input:

output:

result:

ok single line: '0'

Test #115:

score: 15

Accepted

time: 10ms

memory: 3620kb

input:

output:

result:

ok single line: '4'

Test #116:

score: 15

Accepted

time: 11ms

memory: 4604kb

input:

output:

result:

ok single line: '99995'

Test #117:

score: 15

Accepted

time: 0ms

memory: 4568kb

input:

200000
1
-60566

output:

result:

ok single line: '0'

Test #118:

score: 15

Accepted

time: 8ms

memory: 3548kb

input:

3
200000
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output:

result:

ok single line: '43109'

Test #119:

score: 15

Accepted

time: 8ms

memory: 3484kb

input:

4
200000
-1
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-2
3
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1
3
-2
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-1...

output:

result:

ok single line: '37984'

Test #120:

score: 15

Accepted

time: 8ms

memory: 3600kb

input:

output:

result:

ok single line: '24825'

Test #121:

score: 15

Accepted

time: 9ms

memory: 3616kb

input:

output:

result:

ok single line: '14590'

Test #122:

score: 15

Accepted

time: 10ms

memory: 3596kb

input:

output:

result:

ok single line: '5580'

Test #123:

score: 15

Accepted

time: 11ms

memory: 3624kb

input:

output:

result:

ok single line: '1248'

Test #124:

score: 15

Accepted

time: 11ms

memory: 3568kb

input:

output:

result:

ok single line: '344'

Test #125:

score: 15

Accepted

time: 10ms

memory: 4568kb

input:

output:

result:

ok single line: '177'

Test #126:

score: 15

Accepted

time: 10ms

memory: 4612kb

input:

output:

result:

ok single line: '174'

Test #127:

score: 15

Accepted

time: 14ms

memory: 4596kb

input:

output:

result:

ok single line: '184'

Test #128:

score: 15

Accepted

time: 13ms

memory: 4592kb

input:

output:

result:

ok single line: '34287'

Test #129:

score: 15

Accepted

time: 13ms

memory: 4684kb

input:

output:

result:

ok single line: '0'

Test #130:

score: 15

Accepted

time: 0ms

memory: 3588kb

input:

output:

result:

ok single line: '1'

Test #131:

score: 15

Accepted

time: 0ms

memory: 3524kb

input:

output:

result:

ok single line: '3'

Test #132:

score: 15

Accepted

time: 0ms

memory: 3536kb

input:

output:

result:

ok single line: '0'

Test #133:

score: 15

Accepted

time: 1ms

memory: 4576kb

input:

output:

result:

ok single line: '3'

Test #134:

score: 15

Accepted

time: 0ms

memory: 3588kb

input:

output:

result:

ok single line: '3'

Extra Test:

score: 0

Extra Test Passed