/// wa
#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")
#include<bits/stdc++.h>
#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MOD = 1e9 + 7;
const int INF = 1e9 + 1e2;
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
void fin() {
#ifdef AM
freopen(".in", "r", stdin);
#endif
}
const bool flag = 0;
const int N = 5e4+10;
int was[N];
int mt[N], p[N], tmp;
vector<int> adj[N], g[N];
bool dfs(int x) {
if (was[x] == tmp) return 0;
was[x] = tmp;
for (int to : adj[x]) {
if (mt[to] == -1) {
mt[to] = x;
p[x] = to;
return 1;
}
}
for (int to : adj[x]) {
if (dfs(to)) {
mt[to] = x;
p[x] = to;
return 1;
}
}
return 0;
}
int n, m, k;
bool check(int l, int r) {
for (int i = l; i <= r; ++i) {
for (int to : g[i]) {
adj[to].pb(i);
}
}
fill(p, p+m, -1);
for (int i = 0; i < m; ++i) {
tmp++;
dfs(i);
}
int ok = 1;
for (int i = 0; i < m; ++i) {
if (~p[i]) {
mt[p[i]] = -1;
} else {
ok = 0;
}
}
for (int i = l; i <= r; ++i) {
for (int to : g[i]) {
adj[to].pop_back();
}
}
return ok;
}
void ma1n() {
cin >> n >> m >> k;
for (int u, v; k--;) {
cin >> u >> v;
u--, v--;
g[u].pb(v);
}
ll ans = 0;
memset(mt, -1, sizeof(mt));
for (int i = 0; i < n; ++i) {
int l = i+m-1;
int r = n;
int j = -1;
while (l <= r) {
int mid = l+r >> 1;
if (check(i, mid)) {
j = mid, r = mid-1;
} else {
l = mid+1;
}
}
if (~j) {
ans += n-j;
}
}
cout << ans;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(nullptr), fin();
int ts = 1;
if (flag) {
cin >> ts;
}
while (ts--) {
ma1n();
}
return 0;
}
Compilation message
marriage.cpp: In function 'void ma1n()':
marriage.cpp:103:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
103 | int mid = l+r >> 1;
| ~^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
3072 KB |
Output isn't correct |
| 2 |
Incorrect |
2 ms |
2924 KB |
Output isn't correct |
| 3 |
Incorrect |
2 ms |
2924 KB |
Output isn't correct |
| 4 |
Incorrect |
2 ms |
2972 KB |
Output isn't correct |
| 5 |
Correct |
3 ms |
2924 KB |
Output is correct |
| 6 |
Correct |
3 ms |
2924 KB |
Output is correct |
| 7 |
Incorrect |
2 ms |
2924 KB |
Output isn't correct |
| 8 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 9 |
Correct |
3 ms |
2924 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 12 |
Correct |
3 ms |
2828 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 14 |
Incorrect |
2 ms |
2944 KB |
Output isn't correct |
| 15 |
Incorrect |
3 ms |
2924 KB |
Output isn't correct |
| 16 |
Incorrect |
3 ms |
2924 KB |
Output isn't correct |
| 17 |
Correct |
4 ms |
2924 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2924 KB |
Output is correct |
| 19 |
Incorrect |
46 ms |
2996 KB |
Output isn't correct |
| 20 |
Incorrect |
19 ms |
2924 KB |
Output isn't correct |
| 21 |
Correct |
4 ms |
2924 KB |
Output is correct |
| 22 |
Incorrect |
4 ms |
2924 KB |
Output isn't correct |
| 23 |
Correct |
5 ms |
2964 KB |
Output is correct |
| 24 |
Correct |
4 ms |
2924 KB |
Output is correct |
| 25 |
Execution timed out |
1577 ms |
3076 KB |
Time limit exceeded |
| 26 |
Incorrect |
423 ms |
3000 KB |
Output isn't correct |
| 27 |
Correct |
23 ms |
2924 KB |
Output is correct |
| 28 |
Incorrect |
12 ms |
2952 KB |
Output isn't correct |
| 29 |
Correct |
217 ms |
3056 KB |
Output is correct |
| 30 |
Correct |
190 ms |
3060 KB |
Output is correct |
| 31 |
Execution timed out |
1531 ms |
3564 KB |
Time limit exceeded |
| 32 |
Execution timed out |
1556 ms |
3052 KB |
Time limit exceeded |
| 33 |
Correct |
65 ms |
2928 KB |
Output is correct |
| 34 |
Incorrect |
76 ms |
2980 KB |
Output isn't correct |
| 35 |
Execution timed out |
1583 ms |
3948 KB |
Time limit exceeded |
| 36 |
Execution timed out |
1544 ms |
3948 KB |
Time limit exceeded |
| 37 |
Execution timed out |
1557 ms |
3596 KB |
Time limit exceeded |
| 38 |
Execution timed out |
1574 ms |
4204 KB |
Time limit exceeded |
| 39 |
Execution timed out |
1585 ms |
3052 KB |
Time limit exceeded |
| 40 |
Execution timed out |
1582 ms |
3180 KB |
Time limit exceeded |
| 41 |
Execution timed out |
1505 ms |
3500 KB |
Time limit exceeded |
| 42 |
Execution timed out |
1559 ms |
3436 KB |
Time limit exceeded |
| 43 |
Execution timed out |
1571 ms |
3564 KB |
Time limit exceeded |
| 44 |
Execution timed out |
1596 ms |
4076 KB |
Time limit exceeded |
| 45 |
Execution timed out |
1570 ms |
3748 KB |
Time limit exceeded |
| 46 |
Execution timed out |
1524 ms |
4732 KB |
Time limit exceeded |
| 47 |
Execution timed out |
1535 ms |
4336 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1548 ms |
4332 KB |
Time limit exceeded |
| 49 |
Execution timed out |
1561 ms |
4332 KB |
Time limit exceeded |
| 50 |
Execution timed out |
1571 ms |
3052 KB |
Time limit exceeded |
