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| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #251509 | #7642. Integer Half-Sum | ucup-team134# | AC ✓ | 0ms | 3948kb | C++20 | 808b | 2023-11-14 19:52:20 | 2023-11-14 19:52:20 |
Judging History
answer
#include<bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define ll long long
using namespace std;
typedef pair<int,int> pii;
const int mod=998244353;
inline int add(int x,int y){int ret=x+y;if(ret>=mod)ret-=mod;return ret;}
inline int sub(int x,int y){int ret=x-y;if(ret<0)ret+=mod;return ret;}
inline int mul(int x,int y){return ((ll)x*y)%mod;}
inline int step(int base,int pw){int ret=1;while(pw){if(pw&1)ret=mul(ret,base);base=mul(base,base);pw>>=1;}return ret;}
inline int invv(int x){return step(x,mod-2);}
const int maxn=3e5+10;
int main(){
///freopen("test.txt","r",stdin);
int l,r;
scanf("%d %d",&l,&r);
if(r-l+1==1)printf("%d\n",r);
else if(r-l+1==2)printf("%d\n",-1);
else printf("%d\n",r-1);
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3916kb
input:
2 4
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3808kb
input:
1 1
output:
1
result:
ok 1 number(s): "1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3872kb
input:
1 2
output:
-1
result:
ok 1 number(s): "-1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
100 100
output:
100
result:
ok 1 number(s): "100"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3748kb
input:
99 100
output:
-1
result:
ok 1 number(s): "-1"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
3 3
output:
3
result:
ok 1 number(s): "3"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3788kb
input:
2 3
output:
-1
result:
ok 1 number(s): "-1"
Test #8:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
1 3
output:
2
result:
ok 1 number(s): "2"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3876kb
input:
2 5
output:
4
result:
ok 1 number(s): "4"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
3 7
output:
6
result:
ok 1 number(s): "6"
Test #11:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
3 8
output:
7
result:
ok 1 number(s): "7"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3752kb
input:
4 10
output:
9
result:
ok 1 number(s): "9"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
35 37
output:
36
result:
ok 1 number(s): "36"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3796kb
input:
43 46
output:
45
result:
ok 1 number(s): "45"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3876kb
input:
82 86
output:
85
result:
ok 1 number(s): "85"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3808kb
input:
55 60
output:
59
result:
ok 1 number(s): "59"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3812kb
input:
25 31
output:
30
result:
ok 1 number(s): "30"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3748kb
input:
37 44
output:
43
result:
ok 1 number(s): "43"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
75 83
output:
82
result:
ok 1 number(s): "82"
Test #20:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
74 83
output:
82
result:
ok 1 number(s): "82"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
88 98
output:
97
result:
ok 1 number(s): "97"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
75 86
output:
85
result:
ok 1 number(s): "85"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3788kb
input:
1 100
output:
99
result:
ok 1 number(s): "99"
Test #24:
score: 0
Accepted
time: 0ms
memory: 3788kb
input:
1 50
output:
49
result:
ok 1 number(s): "49"
Test #25:
score: 0
Accepted
time: 0ms
memory: 3864kb
input:
50 100
output:
99
result:
ok 1 number(s): "99"
Test #26:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
7 35
output:
34
result:
ok 1 number(s): "34"
Test #27:
score: 0
Accepted
time: 0ms
memory: 3920kb
input:
87 95
output:
94
result:
ok 1 number(s): "94"
Test #28:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
11 30
output:
29
result:
ok 1 number(s): "29"
Test #29:
score: 0
Accepted
time: 0ms
memory: 3880kb
input:
47 69
output:
68
result:
ok 1 number(s): "68"
Test #30:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
11 48
output:
47
result:
ok 1 number(s): "47"
Test #31:
score: 0
Accepted
time: 0ms
memory: 3864kb
input:
71 85
output:
84
result:
ok 1 number(s): "84"
Test #32:
score: 0
Accepted
time: 0ms
memory: 3872kb
input:
84 89
output:
88
result:
ok 1 number(s): "88"
Test #33:
score: 0
Accepted
time: 0ms
memory: 3788kb
input:
22 56
output:
55
result:
ok 1 number(s): "55"
Test #34:
score: 0
Accepted
time: 0ms
memory: 3852kb
input:
2 72
output:
71
result:
ok 1 number(s): "71"
Test #35:
score: 0
Accepted
time: 0ms
memory: 3852kb
input:
18 55
output:
54
result:
ok 1 number(s): "54"
Test #36:
score: 0
Accepted
time: 0ms
memory: 3884kb
input:
4 11
output:
10
result:
ok 1 number(s): "10"
Test #37:
score: 0
Accepted
time: 0ms
memory: 3944kb
input:
42 59
output:
58
result:
ok 1 number(s): "58"
Test #38:
score: 0
Accepted
time: 0ms
memory: 3884kb
input:
52 79
output:
78
result:
ok 1 number(s): "78"
Test #39:
score: 0
Accepted
time: 0ms
memory: 3756kb
input:
11 48
output:
47
result:
ok 1 number(s): "47"
Test #40:
score: 0
Accepted
time: 0ms
memory: 3816kb
input:
4 51
output:
50
result:
ok 1 number(s): "50"
Test #41:
score: 0
Accepted
time: 0ms
memory: 3940kb
input:
3 60
output:
59
result:
ok 1 number(s): "59"
Test #42:
score: 0
Accepted
time: 0ms
memory: 3784kb
input:
21 88
output:
87
result:
ok 1 number(s): "87"
Test #43:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
17 94
output:
93
result:
ok 1 number(s): "93"
Test #44:
score: 0
Accepted
time: 0ms
memory: 3868kb
input:
11 98
output:
97
result:
ok 1 number(s): "97"
Test #45:
score: 0
Accepted
time: 0ms
memory: 3948kb
input:
2 99
output:
98
result:
ok 1 number(s): "98"
Extra Test:
score: 0
Extra Test Passed