/// In The Name Of God
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,sse3,sse4,popcnt,abm,mmx")
#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pp pop_back
#define mp make_pair
#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()
#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define nl '\n'
#define ioi exit(0);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
const int N = (int)32000 + 7, inf = (int)1e9 + 7, mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;
const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1}, dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
using namespace std;
int n, m, k;
vector <int> g[N];
int tmr, tmr1;
int p[N];
int was[N], good[N];
int dfs(int v, int L, int R) {
if (was[v] == tmr) return 0;
was[v] = tmr;
for (auto to : g[v]) {
if (!(L <= to && to <= R)) continue;
if (p[to] == -1 || dfs(p[to], L, R)) {
p[to] = v;
return 1;
}
}
return 0;
}
int ok(int L, int R) {
L += m, R += m;
memset(p, -1, sizeof(p));
++tmr;
++tmr1;
int cnt = 0, last = inf;
for (int i = m; i >= 1; i--) {
for (auto to : g[i]) {
if (p[to] == -1 && L <= to && to <= R) {
p[to] = i;
good[i] = tmr1;
last = min(last, to - m);
++cnt;
break;
}
}
}
if (cnt == m) return last;
for (int i = 1; i <= m; i++) {
if (good[i] == tmr1) continue;
++tmr;
int now = cnt;
cnt += dfs(i, L, R);
}
if (cnt == m) {
for (int i = m + 1; i <= n + m; i++) {
if (p[i] != -1) {
return i - m;
}
}
}
return 0;
}
int main() {
#ifdef IOI2018
freopen ("in.txt", "r", stdin);
#endif
Kazakhstan
cin >> n >> m >> k;
for (int i = 1; i <= k; i++) {
int a, b;
cin >> b >> a;
g[a].pb(b + m);
}
for (int i = 1; i <= m; i++) {
sort(all(g[i]), greater <int> ());
}
int ans = 0, l = 1;
for (int i = 1; i <= min(2500, n); i++) {
while (1) {
int nxt = ok(l, i);
if (!nxt) break;
l = nxt + 1;
}
ans += l - 1;
}
cout << ans;
ioi
}
Compilation message
marriage.cpp: In function 'int ok(int, int)':
marriage.cpp:74:7: warning: unused variable 'now' [-Wunused-variable]
int now = cnt;
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 2 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 3 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 4 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 5 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 6 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 7 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 8 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 9 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 10 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 11 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 12 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 13 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 14 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 15 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 16 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 17 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 18 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 19 |
Correct |
6 ms |
3304 KB |
Output is correct |
| 20 |
Correct |
3 ms |
3304 KB |
Output is correct |
| 21 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 22 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 23 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 24 |
Correct |
0 ms |
3304 KB |
Output is correct |
| 25 |
Correct |
143 ms |
3304 KB |
Output is correct |
| 26 |
Correct |
46 ms |
3304 KB |
Output is correct |
| 27 |
Correct |
3 ms |
3304 KB |
Output is correct |
| 28 |
Correct |
3 ms |
3304 KB |
Output is correct |
| 29 |
Correct |
16 ms |
3304 KB |
Output is correct |
| 30 |
Correct |
13 ms |
3304 KB |
Output is correct |
| 31 |
Execution timed out |
1500 ms |
3568 KB |
Execution timed out |
| 32 |
Correct |
869 ms |
3304 KB |
Output is correct |
| 33 |
Correct |
13 ms |
3304 KB |
Output is correct |
| 34 |
Correct |
13 ms |
3304 KB |
Output is correct |
| 35 |
Correct |
293 ms |
3832 KB |
Output is correct |
| 36 |
Correct |
209 ms |
3832 KB |
Output is correct |
| 37 |
Execution timed out |
1500 ms |
3568 KB |
Execution timed out |
| 38 |
Correct |
393 ms |
3832 KB |
Output is correct |
| 39 |
Incorrect |
63 ms |
3304 KB |
Output isn't correct |
| 40 |
Correct |
316 ms |
3304 KB |
Output is correct |
| 41 |
Incorrect |
796 ms |
3436 KB |
Output isn't correct |
| 42 |
Incorrect |
303 ms |
3436 KB |
Output isn't correct |
| 43 |
Incorrect |
489 ms |
3568 KB |
Output isn't correct |
| 44 |
Incorrect |
863 ms |
3832 KB |
Output isn't correct |
| 45 |
Incorrect |
613 ms |
3436 KB |
Output isn't correct |
| 46 |
Execution timed out |
1500 ms |
3832 KB |
Execution timed out |
| 47 |
Incorrect |
1018 ms |
3832 KB |
Output isn't correct |
| 48 |
Incorrect |
946 ms |
3832 KB |
Output isn't correct |
| 49 |
Execution timed out |
1500 ms |
3832 KB |
Execution timed out |
| 50 |
Incorrect |
86 ms |
3304 KB |
Output isn't correct |
