QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #229430 | #7642. Integer Half-Sum | ucup-team1191# | AC ✓ | 0ms | 3704kb | C++20 | 2.7kb | 2023-10-28 16:09:13 | 2023-10-28 16:09:13 |
Judging History
answer
/*
author: Maksim1744
created: 28.10.2023 11:08:32
*/
#include "bits/stdc++.h"
using namespace std;
using ll = long long;
using ld = long double;
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define sum(a) ( accumulate ((a).begin(), (a).end(), 0ll))
#define mine(a) (*min_element((a).begin(), (a).end()))
#define maxe(a) (*max_element((a).begin(), (a).end()))
#define mini(a) ( min_element((a).begin(), (a).end()) - (a).begin())
#define maxi(a) ( max_element((a).begin(), (a).end()) - (a).begin())
#define lowb(a, x) ( lower_bound((a).begin(), (a).end(), (x)) - (a).begin())
#define uppb(a, x) ( upper_bound((a).begin(), (a).end(), (x)) - (a).begin())
template<typename T> vector<T>& operator-- (vector<T> &v){for (auto& i : v) --i; return v;}
template<typename T> vector<T>& operator++ (vector<T> &v){for (auto& i : v) ++i; return v;}
template<typename T> istream& operator>>(istream& is, vector<T> &v){for (auto& i : v) is >> i; return is;}
template<typename T> ostream& operator<<(ostream& os, vector<T> v){for (auto& i : v) os << i << ' '; return os;}
template<typename T, typename U> pair<T,U>& operator-- (pair<T, U> &p){--p.first; --p.second; return p;}
template<typename T, typename U> pair<T,U>& operator++ (pair<T, U> &p){++p.first; ++p.second; return p;}
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U> &p){is >> p.first >> p.second; return is;}
template<typename T, typename U> ostream& operator<<(ostream& os, pair<T, U> p){os << p.first << ' ' << p.second; return os;}
template<typename T, typename U> pair<T,U> operator-(pair<T,U> a, pair<T,U> b){return mp(a.first-b.first, a.second-b.second);}
template<typename T, typename U> pair<T,U> operator+(pair<T,U> a, pair<T,U> b){return mp(a.first+b.first, a.second+b.second);}
template<typename T, typename U> void umin(T& a, U b){if (a > b) a = b;}
template<typename T, typename U> void umax(T& a, U b){if (a < b) a = b;}
#ifdef HOME
#define SHOW_COLORS
#include "/mnt/c/Libs/tools/print.cpp"
#else
#define show(...) void(0)
#define debugf(fun) fun
#define debugv(var) var
#define mclock void(0)
#define shows void(0)
#define debug if (false)
#define OSTREAM(...) ;
#define OSTREAM0(...) ;
#endif
int main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
int l, r;
cin >> l >> r;
if (l == r) {
cout << l << '\n';
} else if (l + 1 == r) {
cout << -1 << '\n';
} else {
cout << r - 1 << '\n';
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3616kb
input:
2 4
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3704kb
input:
1 1
output:
1
result:
ok 1 number(s): "1"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3704kb
input:
1 2
output:
-1
result:
ok 1 number(s): "-1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
100 100
output:
100
result:
ok 1 number(s): "100"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
99 100
output:
-1
result:
ok 1 number(s): "-1"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3648kb
input:
3 3
output:
3
result:
ok 1 number(s): "3"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3580kb
input:
2 3
output:
-1
result:
ok 1 number(s): "-1"
Test #8:
score: 0
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time: 0ms
memory: 3704kb
input:
1 3
output:
2
result:
ok 1 number(s): "2"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3608kb
input:
2 5
output:
4
result:
ok 1 number(s): "4"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
3 7
output:
6
result:
ok 1 number(s): "6"
Test #11:
score: 0
Accepted
time: 0ms
memory: 3684kb
input:
3 8
output:
7
result:
ok 1 number(s): "7"
Test #12:
score: 0
Accepted
time: 0ms
memory: 3552kb
input:
4 10
output:
9
result:
ok 1 number(s): "9"
Test #13:
score: 0
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time: 0ms
memory: 3680kb
input:
35 37
output:
36
result:
ok 1 number(s): "36"
Test #14:
score: 0
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time: 0ms
memory: 3612kb
input:
43 46
output:
45
result:
ok 1 number(s): "45"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
82 86
output:
85
result:
ok 1 number(s): "85"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3540kb
input:
55 60
output:
59
result:
ok 1 number(s): "59"
Test #17:
score: 0
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time: 0ms
memory: 3616kb
input:
25 31
output:
30
result:
ok 1 number(s): "30"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3704kb
input:
37 44
output:
43
result:
ok 1 number(s): "43"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3576kb
input:
75 83
output:
82
result:
ok 1 number(s): "82"
Test #20:
score: 0
Accepted
time: 0ms
memory: 3528kb
input:
74 83
output:
82
result:
ok 1 number(s): "82"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
88 98
output:
97
result:
ok 1 number(s): "97"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
75 86
output:
85
result:
ok 1 number(s): "85"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3644kb
input:
1 100
output:
99
result:
ok 1 number(s): "99"
Test #24:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
1 50
output:
49
result:
ok 1 number(s): "49"
Test #25:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
50 100
output:
99
result:
ok 1 number(s): "99"
Test #26:
score: 0
Accepted
time: 0ms
memory: 3680kb
input:
7 35
output:
34
result:
ok 1 number(s): "34"
Test #27:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
87 95
output:
94
result:
ok 1 number(s): "94"
Test #28:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
11 30
output:
29
result:
ok 1 number(s): "29"
Test #29:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
47 69
output:
68
result:
ok 1 number(s): "68"
Test #30:
score: 0
Accepted
time: 0ms
memory: 3620kb
input:
11 48
output:
47
result:
ok 1 number(s): "47"
Test #31:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
71 85
output:
84
result:
ok 1 number(s): "84"
Test #32:
score: 0
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time: 0ms
memory: 3568kb
input:
84 89
output:
88
result:
ok 1 number(s): "88"
Test #33:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
22 56
output:
55
result:
ok 1 number(s): "55"
Test #34:
score: 0
Accepted
time: 0ms
memory: 3700kb
input:
2 72
output:
71
result:
ok 1 number(s): "71"
Test #35:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
18 55
output:
54
result:
ok 1 number(s): "54"
Test #36:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
4 11
output:
10
result:
ok 1 number(s): "10"
Test #37:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
42 59
output:
58
result:
ok 1 number(s): "58"
Test #38:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
52 79
output:
78
result:
ok 1 number(s): "78"
Test #39:
score: 0
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time: 0ms
memory: 3616kb
input:
11 48
output:
47
result:
ok 1 number(s): "47"
Test #40:
score: 0
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time: 0ms
memory: 3624kb
input:
4 51
output:
50
result:
ok 1 number(s): "50"
Test #41:
score: 0
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time: 0ms
memory: 3604kb
input:
3 60
output:
59
result:
ok 1 number(s): "59"
Test #42:
score: 0
Accepted
time: 0ms
memory: 3704kb
input:
21 88
output:
87
result:
ok 1 number(s): "87"
Test #43:
score: 0
Accepted
time: 0ms
memory: 3648kb
input:
17 94
output:
93
result:
ok 1 number(s): "93"
Test #44:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
11 98
output:
97
result:
ok 1 number(s): "97"
Test #45:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
2 99
output:
98
result:
ok 1 number(s): "98"
Extra Test:
score: 0
Extra Test Passed