# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
934468 |
2024-02-27T11:29:32 Z |
peterandvoi |
Game (IOI14_game) |
C++17 |
|
1 ms |
2396 KB |
#include <bits/stdc++.h>
using namespace std;
#ifdef ngu
#include "debug.h"
#else
#define debug(...) 42
#endif
const int N = 1500;
int _n, cc;
int e[N];
int cnt[N][N];
int cant[N];
int get(int u) {
return e[u] < 0 ? u : e[u] = get(e[u]);
}
void join(int u, int v) {
if (e[u] > e[v]) {
swap(u, v);
}
e[u] += e[v];
e[v] = u;
cant[u] = 0;
for (int i = 0; i < _n; ++i) {
if (i != u && get(i) == i) {
cnt[u][i] += cnt[v][i];
} else {
cnt[u][i] = 0;
}
cant[u] += cnt[u][i] == 0;
}
for (int i = 0; i < _n; ++i) {
if (i != u && get(i) == i) {
cant[i] -= cnt[i][v] == 0;
cant[i] -= cnt[i][u] == 0;
cnt[i][u] += cnt[i][v];
cnt[i][v] = 0;
cant[i]++;
cant[i] += cnt[i][u] == 0;
}
}
}
bool same(int u, int v) {
return get(u) == get(v);
}
bool need_merge(int u) {
return cant[u] == _n - 1;
}
void initialize(int n) {
_n = n;
cc = _n;
fill(e, e + n, -1);
for (int i = 0; i < n; ++i) {
for (int j = 0; j < n; ++j) {
if (i != j) {
cnt[i][j]++;
}
}
cant[i] = 1;
}
}
int hasEdge(int u, int v) {
if (same(u, v)) {
return 0;
}
u = get(u);
v = get(v);
if (cnt[u][v] == 1 && (need_merge(u) || need_merge(v))) {
join(u, v);
cc--;
return 1;
}
cnt[u][v]--;
cnt[v][u]--;
cant[u] += cnt[u][v] == 0;
cant[v] += cnt[u][v] == 0;
return 0;
}
#ifdef ngu
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
#ifdef ngu
freopen("test.inp", "r", stdin);
freopen("test.out", "w", stdout);
#endif
int n;
cin >> n;
initialize(n);
for (int i = 0; i < n; ++i) {
debug(i, get(i));
}
for (int i = 0; i < n * (n - 1) / 2; ++i) {
int u, v;
cin >> u >> v;
assert(cc > 1);
debug(u, v, hasEdge(u, v));
for (int j = 0; j < n; ++j) {
debug(j, cant[j]);
}
}
assert(cc == 1);
}
#endif
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2396 KB |
Output is correct |
4 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2392 KB |
Output is correct |
3 |
Correct |
1 ms |
2396 KB |
Output is correct |
4 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
0 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2396 KB |
Output is correct |
4 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |