QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#505078 | #7178. Bishops | Esouling | WA | 119ms | 23452kb | C++20 | 1.3kb | 2024-08-04 19:29:17 | 2024-08-04 19:29:18 |
Judging History
answer
#include <bits/stdc++.h>
using loint = long long;
using db = double;
void solve() {
int n, m;
std::cin >> n >> m;
int inv = 0;
if (n > m) {
std::swap(n, m);
inv = 1;
}
std::vector<std::pair<int, int>> ans;
std::set<int> st1, st2;
int l = 1, r = m;
int cur = 1;
while (l <= r) {
if (cur & 1) {
for (int i = 1; i <= n; i ++) {
if (st1.count(i + l) == 0 && st2.count(i - l) == 0) {
st1.insert(i + l);
st2.insert(i - l);
ans.push_back({i, l});
}
}
l += std::max(1, n - 2);
} else {
for (int i = 1; i <= n; i ++) {
if (st1.count(i + r) == 0 && st2.count(i - r) == 0) {
st1.insert(i + r);
st2.insert(i - r);
ans.push_back({i, r});
}
}
r -= std::max(1, n - 2);
}
cur ^= 1;
}
std::cout << ans.size() << '\n';
for (auto &[x, y] : ans) {
if (inv) std::swap(x, y);
std::cout << x << ' ' << y << '\n';
}
}
int main() {
std::ios::sync_with_stdio(false);
std::cin.tie(0);
std::cout.tie(0);
solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3820kb
input:
2 5
output:
6 1 1 2 1 1 5 2 5 1 3 2 3
result:
ok n: 2, m: 5, bishops: 6
Test #2:
score: 0
Accepted
time: 0ms
memory: 3608kb
input:
5 5
output:
8 1 1 2 1 3 1 4 1 5 1 2 5 3 5 4 5
result:
ok n: 5, m: 5, bishops: 8
Test #3:
score: 0
Accepted
time: 110ms
memory: 23368kb
input:
100000 100000
output:
199998 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1 22 1 23 1 24 1 25 1 26 1 27 1 28 1 29 1 30 1 31 1 32 1 33 1 34 1 35 1 36 1 37 1 38 1 39 1 40 1 41 1 42 1 43 1 44 1 45 1 46 1 47 1 48 1 49 1 50 1 51 1 52 1 53 1 54 1 55 1 56 1 57 1 58 1 59 1 60 1 61...
result:
ok n: 100000, m: 100000, bishops: 199998
Test #4:
score: 0
Accepted
time: 119ms
memory: 23452kb
input:
100000 99999
output:
199998 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1 22 1 23 1 24 1 25 1 26 1 27 1 28 1 29 1 30 1 31 1 32 1 33 1 34 1 35 1 36 1 37 1 38 1 39 1 40 1 41 1 42 1 43 1 44 1 45 1 46 1 47 1 48 1 49 1 50 1 51 1 52 1 53 1 54 1 55 1 56 1 57 1 58 1 59 1 60 1 ...
result:
ok n: 100000, m: 99999, bishops: 199998
Test #5:
score: -100
Wrong Answer
time: 87ms
memory: 18492kb
input:
100000 50000
output:
149996 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 1 19 1 20 1 21 1 22 1 23 1 24 1 25 1 26 1 27 1 28 1 29 1 30 1 31 1 32 1 33 1 34 1 35 1 36 1 37 1 38 1 39 1 40 1 41 1 42 1 43 1 44 1 45 1 46 1 47 1 48 1 49 1 50 1 51 1 52 1 53 1 54 1 55 1 56 1 57 1 58 1 59 1 60 1 ...
result:
wrong answer Participant's answer is not optimal (149996 < 149998)