#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define fast ios_base::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
#define file(s) freopen(s".in", "r", stdin);freopen(s".out", "w", stdout);
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define sz size()
#define ft first
#define sd second
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef unsigned long long ull;
const int N = 2e5 + 10;
const int M = 1e3 + 5;
const ll inf = 2e18;
const ll mod = 1e9 + 7;
const double Pi = acos(-1);
ll binpow(ll x, ll ti) { ll res = 1;while (ti){if(ti & 1)res *= x;x *= x;ti >>= 1; x %= mod; res %= mod;} return res;}
ll binmul(ll x, ll ti) { ll res = 0;while (ti){if(ti & 1)res += x;x += x;ti >>= 1; x %= mod; res %= mod;} return res;}
ll nok(ll a, ll b) { return (a*b)/__gcd(abs(a),abs(b)) * (a*b > 0 ? 1 : -1); }
bool odd(ll n) { return (n % 2 == 1); }
bool even(ll n) { return (n % 2 == 0); }
ll n, m, k, a[N], b[N], mt[N], ans;
vector <ll> g[N];
bool used[N];
bool dfs(ll v, ll l, ll r) {
if (v < l || r < v) return 0;
used[v] = 1;
for (auto to : g[v]) {
if (mt[to] == -1) {
mt[to] = v;
return 1;
}
}
for (auto to : g[v]) {
if (!used[mt[to]] && dfs(mt[to], l, r)) {
mt[to] = v;
return 1;
}
}
return 0;
}
bool check(ll l, ll r) {
memset(mt, -1, sizeof(mt));
for (int i = l; i <= r; ++ i) {
memset(used, 0, sizeof(used));
dfs(i, l, r);
}
for (int i = 1; i <= m; ++ i) {
if (mt[i] == -1) return 0;
}
return 1;
}
const void solve(/*Armashka*/) {
cin >> n >> m >> k;
for (int i = 1; i <= k; ++ i) cin >> a[i] >> b[i], g[a[i]].pb(b[i]);
for (int i = 1; i <= n; ++ i) {
int l = 1, r = n - i + 1, j = -1;
while (l <= r) {
ll mid = (l + r) / 2;
if (check(i, i + mid - 1)) r = mid - 1, j = i + mid - 1;
else l = mid + 1;
}
if (j == -1) continue;
ans += n - j + 1;
}
cout << ans;
}
signed main() {
srand(time(NULL));
fast;
// file("");
int tt = 1;
// cin >> tt;
while (tt --) {
solve();
}
}
// Uaqyt, otedi, ketedi, mulde bilinbei, ulger
// Kunder seni kutpeidi, susyz ospeidi gulder
Compilation message
marriage.cpp:5: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
5 | #pragma comment(linker, "/stack:200000000")
|
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 2 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 3 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 4 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 5 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 6 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 7 |
Correct |
8 ms |
6776 KB |
Output is correct |
| 8 |
Correct |
3 ms |
6732 KB |
Output is correct |
| 9 |
Correct |
4 ms |
6740 KB |
Output is correct |
| 10 |
Correct |
3 ms |
6732 KB |
Output is correct |
| 11 |
Correct |
3 ms |
6732 KB |
Output is correct |
| 12 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 13 |
Correct |
4 ms |
6732 KB |
Output is correct |
| 14 |
Correct |
8 ms |
6732 KB |
Output is correct |
| 15 |
Correct |
8 ms |
6732 KB |
Output is correct |
| 16 |
Correct |
11 ms |
6772 KB |
Output is correct |
| 17 |
Correct |
9 ms |
6732 KB |
Output is correct |
| 18 |
Correct |
9 ms |
6780 KB |
Output is correct |
| 19 |
Correct |
121 ms |
6860 KB |
Output is correct |
| 20 |
Correct |
120 ms |
6780 KB |
Output is correct |
| 21 |
Correct |
143 ms |
6764 KB |
Output is correct |
| 22 |
Correct |
145 ms |
6768 KB |
Output is correct |
| 23 |
Correct |
127 ms |
6732 KB |
Output is correct |
| 24 |
Correct |
127 ms |
6732 KB |
Output is correct |
| 25 |
Execution timed out |
1585 ms |
7116 KB |
Time limit exceeded |
| 26 |
Execution timed out |
1586 ms |
6860 KB |
Time limit exceeded |
| 27 |
Execution timed out |
1586 ms |
6732 KB |
Time limit exceeded |
| 28 |
Execution timed out |
1587 ms |
6732 KB |
Time limit exceeded |
| 29 |
Execution timed out |
1593 ms |
6988 KB |
Time limit exceeded |
| 30 |
Execution timed out |
1584 ms |
6988 KB |
Time limit exceeded |
| 31 |
Execution timed out |
1574 ms |
8144 KB |
Time limit exceeded |
| 32 |
Execution timed out |
1588 ms |
6860 KB |
Time limit exceeded |
| 33 |
Execution timed out |
1592 ms |
6732 KB |
Time limit exceeded |
| 34 |
Execution timed out |
1578 ms |
6732 KB |
Time limit exceeded |
| 35 |
Execution timed out |
1585 ms |
9420 KB |
Time limit exceeded |
| 36 |
Execution timed out |
1597 ms |
9100 KB |
Time limit exceeded |
| 37 |
Execution timed out |
1590 ms |
8268 KB |
Time limit exceeded |
| 38 |
Execution timed out |
1592 ms |
9804 KB |
Time limit exceeded |
| 39 |
Execution timed out |
1589 ms |
7020 KB |
Time limit exceeded |
| 40 |
Execution timed out |
1600 ms |
7116 KB |
Time limit exceeded |
| 41 |
Execution timed out |
1593 ms |
7372 KB |
Time limit exceeded |
| 42 |
Execution timed out |
1600 ms |
7628 KB |
Time limit exceeded |
| 43 |
Execution timed out |
1598 ms |
8212 KB |
Time limit exceeded |
| 44 |
Execution timed out |
1590 ms |
9328 KB |
Time limit exceeded |
| 45 |
Execution timed out |
1588 ms |
7884 KB |
Time limit exceeded |
| 46 |
Execution timed out |
1593 ms |
9544 KB |
Time limit exceeded |
| 47 |
Execution timed out |
1552 ms |
9692 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1580 ms |
9744 KB |
Time limit exceeded |
| 49 |
Execution timed out |
1600 ms |
9908 KB |
Time limit exceeded |
| 50 |
Execution timed out |
1585 ms |
7028 KB |
Time limit exceeded |
