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QOJ
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| #228469 | #7642. Integer Half-Sum | ucup-team1001# | AC ✓ | 1ms | 3572kb | C++23 | 1.2kb | 2023-10-28 13:34:08 | 2023-10-28 13:34:09 |
Judging History
answer
#include<bits/stdc++.h>
#define irep(i,l,r) for(int (i) = (l); (i) <= (r); ++(i))
#define drep(i,r,l) for(int (i) = (r); (i) >= (l); --(i))
#define ceil(pp,qq) (((pp)>0)^((qq)>0)?-abs(pp)/abs(qq):(pp)%(qq)?(pp)/(qq)+1:(pp)/(qq))
#define floor(pp,qq) (((pp)>0)^((qq)>0)?-ceil(abs(pp),abs(qq)):(pp)/(qq))
#define ll long long
#define LL __int128
using namespace std;
inline ll read(){
char ch = getchar();
ll s = 0; bool w = 0;
while(!isdigit(ch)){if(ch == '-')w = 1;ch = getchar();}
while(isdigit(ch))s = (s << 3) + (s << 1) + (ch ^ 48), ch = getchar();
return w ? - s : s;
}
inline char rc(){
char ch = getchar();
while(1){
if(ch >= 'A' && ch <= 'Z')return ch;
if(ch >= 'a' && ch <= 'z')return ch;
ch = getchar();
}
}
template<class T1, class T2>
T1 min(T1 AA, T2 BB){return AA > BB ? BB : AA;}
template<class T1, class T2>
T1 max(T1 AA, T2 BB){return AA < BB ? BB : AA;}
const int itinf = 1e9;
const ll llinf = 4e18;
const int mod = 1000000007;
const int N = 500009;
int main(){
int l = read(), r = read();
if(l == r){
cout << l;
}
else if(r == l + 1){
puts("-1");
}
else{
cout << r - 1;
}
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3272kb
input:
2 4
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3388kb
input:
1 1
output:
1
result:
ok 1 number(s): "1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3352kb
input:
1 2
output:
-1
result:
ok 1 number(s): "-1"
Test #4:
score: 0
Accepted
time: 1ms
memory: 3336kb
input:
100 100
output:
100
result:
ok 1 number(s): "100"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3364kb
input:
99 100
output:
-1
result:
ok 1 number(s): "-1"
Test #6:
score: 0
Accepted
time: 1ms
memory: 3564kb
input:
3 3
output:
3
result:
ok 1 number(s): "3"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3524kb
input:
2 3
output:
-1
result:
ok 1 number(s): "-1"
Test #8:
score: 0
Accepted
time: 0ms
memory: 3564kb
input:
1 3
output:
2
result:
ok 1 number(s): "2"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3352kb
input:
2 5
output:
4
result:
ok 1 number(s): "4"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3336kb
input:
3 7
output:
6
result:
ok 1 number(s): "6"
Test #11:
score: 0
Accepted
time: 0ms
memory: 3344kb
input:
3 8
output:
7
result:
ok 1 number(s): "7"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
4 10
output:
9
result:
ok 1 number(s): "9"
Test #13:
score: 0
Accepted
time: 1ms
memory: 3364kb
input:
35 37
output:
36
result:
ok 1 number(s): "36"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3564kb
input:
43 46
output:
45
result:
ok 1 number(s): "45"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3392kb
input:
82 86
output:
85
result:
ok 1 number(s): "85"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3368kb
input:
55 60
output:
59
result:
ok 1 number(s): "59"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
25 31
output:
30
result:
ok 1 number(s): "30"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3560kb
input:
37 44
output:
43
result:
ok 1 number(s): "43"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3388kb
input:
75 83
output:
82
result:
ok 1 number(s): "82"
Test #20:
score: 0
Accepted
time: 0ms
memory: 3332kb
input:
74 83
output:
82
result:
ok 1 number(s): "82"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3524kb
input:
88 98
output:
97
result:
ok 1 number(s): "97"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3528kb
input:
75 86
output:
85
result:
ok 1 number(s): "85"
Test #23:
score: 0
Accepted
time: 1ms
memory: 3564kb
input:
1 100
output:
99
result:
ok 1 number(s): "99"
Test #24:
score: 0
Accepted
time: 0ms
memory: 3328kb
input:
1 50
output:
49
result:
ok 1 number(s): "49"
Test #25:
score: 0
Accepted
time: 1ms
memory: 3524kb
input:
50 100
output:
99
result:
ok 1 number(s): "99"
Test #26:
score: 0
Accepted
time: 0ms
memory: 3444kb
input:
7 35
output:
34
result:
ok 1 number(s): "34"
Test #27:
score: 0
Accepted
time: 0ms
memory: 3448kb
input:
87 95
output:
94
result:
ok 1 number(s): "94"
Test #28:
score: 0
Accepted
time: 0ms
memory: 3332kb
input:
11 30
output:
29
result:
ok 1 number(s): "29"
Test #29:
score: 0
Accepted
time: 0ms
memory: 3340kb
input:
47 69
output:
68
result:
ok 1 number(s): "68"
Test #30:
score: 0
Accepted
time: 0ms
memory: 3404kb
input:
11 48
output:
47
result:
ok 1 number(s): "47"
Test #31:
score: 0
Accepted
time: 1ms
memory: 3388kb
input:
71 85
output:
84
result:
ok 1 number(s): "84"
Test #32:
score: 0
Accepted
time: 0ms
memory: 3400kb
input:
84 89
output:
88
result:
ok 1 number(s): "88"
Test #33:
score: 0
Accepted
time: 1ms
memory: 3516kb
input:
22 56
output:
55
result:
ok 1 number(s): "55"
Test #34:
score: 0
Accepted
time: 0ms
memory: 3336kb
input:
2 72
output:
71
result:
ok 1 number(s): "71"
Test #35:
score: 0
Accepted
time: 0ms
memory: 3336kb
input:
18 55
output:
54
result:
ok 1 number(s): "54"
Test #36:
score: 0
Accepted
time: 0ms
memory: 3364kb
input:
4 11
output:
10
result:
ok 1 number(s): "10"
Test #37:
score: 0
Accepted
time: 0ms
memory: 3348kb
input:
42 59
output:
58
result:
ok 1 number(s): "58"
Test #38:
score: 0
Accepted
time: 0ms
memory: 3276kb
input:
52 79
output:
78
result:
ok 1 number(s): "78"
Test #39:
score: 0
Accepted
time: 1ms
memory: 3564kb
input:
11 48
output:
47
result:
ok 1 number(s): "47"
Test #40:
score: 0
Accepted
time: 0ms
memory: 3348kb
input:
4 51
output:
50
result:
ok 1 number(s): "50"
Test #41:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
3 60
output:
59
result:
ok 1 number(s): "59"
Test #42:
score: 0
Accepted
time: 0ms
memory: 3408kb
input:
21 88
output:
87
result:
ok 1 number(s): "87"
Test #43:
score: 0
Accepted
time: 1ms
memory: 3444kb
input:
17 94
output:
93
result:
ok 1 number(s): "93"
Test #44:
score: 0
Accepted
time: 1ms
memory: 3408kb
input:
11 98
output:
97
result:
ok 1 number(s): "97"
Test #45:
score: 0
Accepted
time: 0ms
memory: 3408kb
input:
2 99
output:
98
result:
ok 1 number(s): "98"
Extra Test:
score: 0
Extra Test Passed