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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#138508 | #5438. Half Mixed | Kronos# | RE | 1ms | 3584kb | C++20 | 2.6kb | 2023-08-11 20:49:50 | 2023-08-11 20:49:53 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int t; cin >> t;
while (t--) {
long long n, m; cin >> n >> m;
long long tot_rects = n * (n + 1) / 2 * m * (m + 1) / 2;
if (tot_rects & 1) {
cout << "No\n";
continue;
}
auto get = [](long long x) {
long long req_sum = x * (x + 1) / 4, req_len = x;
vector <long long> groups;
/*
x * (x + 1) / 2 + (L - x) <= S
*/
while (req_len > 0 and req_sum > 0) {
long long l = 1, r = req_len;
while (r - l > 1) {
long long mid = (l + r) >> 1;
if (mid * (mid + 1) / 2 + (req_len - mid) <= req_sum) l = mid;
else r = mid;
}
// for (long long opt = req_len; opt > 0; --opt) {
// long long rest_ones = req_len - opt;
// if (opt <= req_len and opt * (opt + 1) / 2 + rest_ones <= req_sum) {
groups.push_back(l);
req_len -= l;
req_sum -= l * (l + 1) / 2;
// break;
// }
// }
}
assert(req_len == 0 and req_sum == 0);
vector <int> ret;
int st = 0;
for (auto x : groups) {
for (int i = 0; i < x; ++i) ret.push_back(st);
st ^= 1;
}
return ret;
};
if (n * (n + 1) / 2 % 2 == 0) {
cout << "Yes\n";
auto f = get(n);
vector <vector <int>> a(n, vector <int>(m));
for (int i = 0; i < m; ++i) {
for (int j = 0; j < n; ++j) {
a[j][i] = f[j];
}
}
for (auto v : a) {
for (auto x : v) {
cout << x << ' ';
}
cout << '\n';
}
} else if (m * (m + 1) / 2 % 2 == 0) {
cout << "Yes\n";
auto f = get(m);
vector <vector <int>> a(n, vector <int>(m));
for (int i = 0; i < n; ++i) {
for (int j = 0; j < m; ++j) {
a[i][j] = f[j];
}
}
for (auto v : a) {
for (auto x : v) {
cout << x << ' ';
}
cout << '\n';
}
} else assert(0);
}
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3584kb
input:
2 2 3 1 1
output:
Yes 0 1 0 0 1 0 No
result:
ok OK, Accepted. (2 test cases)
Test #2:
score: -100
Dangerous Syscalls
input:
5382 1 1 1 2 2 1 1 3 2 2 3 1 1 4 2 3 3 2 4 1 1 5 2 4 3 3 4 2 5 1 1 6 2 5 3 4 4 3 5 2 6 1 1 7 2 6 3 5 4 4 5 3 6 2 7 1 1 8 2 7 3 6 4 5 5 4 6 3 7 2 8 1 1 9 2 8 3 7 4 6 5 5 6 4 7 3 8 2 9 1 1 10 2 9 3 8 4 7 5 6 6 5 7 4 8 3 9 2 10 1 1 11 2 10 3 9 4 8 5 7 6 6 7 5 8 4 9 3 10 2 11 1 1 12 2 11 3 10 4 9 5 8 6 ...