/*
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
*/
#include<bits/stdc++.h>
#define ld long double
#define sz(v) (int)v.size()
#define ll long long
#define pb push_back
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define nl "\n"
using namespace std;
using pii = pair<int, int>;
const int N = (int)3e4 + 7; // make sure this is right
const int M = (int)2e3 + 7;
const int inf = (int)2e9 + 7;
const ll INF = (ll)3e18 + 7;
const double PI = acos(-1);
ll MOD = (ll)1e9 + 7; // make sure this is right
bool bit(int x, int i) {
return x >> i & 1;
}
int sum(int x, int y) {
x += y;
if(x >= MOD) x -= MOD;
return x;
}
pii dir[] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
int n, m, k, mt[N + M];
int T, used[N], a[4 * N], b[4 * N];
vector<int> g[N];
bool dfs(int v) {
if(used[v] == T) return 0;
used[v] = T;
for(auto to : g[v]) {
if(mt[to] == -1) {
mt[to] = v;
return 1;
}
}
for(auto to : g[v]) {
if(dfs(mt[to])) {
mt[to] = v;
return 1;
}
}
return 0;
}
void solve() {
cin >> n >> m >> k;
for(int i = 1; i <= k; ++i) {
cin >> a[i] >> b[i];
}
int ans = 0;
for(int l = 1; l <= n; ++l) {
for(int r = l; r <= n; ++r) {
for(int i = 1; i <= n; ++i) g[i].clear();
for(int i = n + 1; i <= n + m; ++i) mt[i] = -1;
for(int i = 1; i <= k; ++i) {
if(a[i] >= l && a[i] <= r) {
g[a[i]].pb(b[i] + n);
}
}
for(int i = 1; i <= n; ++i) {
T++;
dfs(i);
}
bool ok = 1;
for(int i = n + 1; i <= n + m && ok; ++i) ok &= (mt[i] != -1);
if(ok) ans++;
}
}
cout << ans;
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
// freopen("g.in", "r", stdin);
// freopen("g.out", "w", stdout);
int test = 1;
//cin >> test;
for(int i = 1; i <= test; ++i) {
//cout << "Case #" << i << ": ";
solve();
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
980 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1032 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1040 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1032 KB |
Output is correct |
| 5 |
Correct |
1 ms |
980 KB |
Output is correct |
| 6 |
Correct |
1 ms |
980 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1012 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1028 KB |
Output is correct |
| 9 |
Correct |
1 ms |
980 KB |
Output is correct |
| 10 |
Correct |
1 ms |
980 KB |
Output is correct |
| 11 |
Correct |
1 ms |
980 KB |
Output is correct |
| 12 |
Correct |
1 ms |
980 KB |
Output is correct |
| 13 |
Correct |
1 ms |
980 KB |
Output is correct |
| 14 |
Correct |
1 ms |
980 KB |
Output is correct |
| 15 |
Correct |
1 ms |
980 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1028 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1032 KB |
Output is correct |
| 18 |
Correct |
1 ms |
980 KB |
Output is correct |
| 19 |
Correct |
167 ms |
1072 KB |
Output is correct |
| 20 |
Correct |
47 ms |
1036 KB |
Output is correct |
| 21 |
Correct |
7 ms |
1036 KB |
Output is correct |
| 22 |
Correct |
5 ms |
980 KB |
Output is correct |
| 23 |
Correct |
38 ms |
1060 KB |
Output is correct |
| 24 |
Correct |
26 ms |
980 KB |
Output is correct |
| 25 |
Execution timed out |
1552 ms |
1388 KB |
Time limit exceeded |
| 26 |
Execution timed out |
1576 ms |
1084 KB |
Time limit exceeded |
| 27 |
Correct |
733 ms |
1108 KB |
Output is correct |
| 28 |
Correct |
419 ms |
1036 KB |
Output is correct |
| 29 |
Execution timed out |
1577 ms |
1212 KB |
Time limit exceeded |
| 30 |
Execution timed out |
1572 ms |
1236 KB |
Time limit exceeded |
| 31 |
Execution timed out |
1575 ms |
2120 KB |
Time limit exceeded |
| 32 |
Execution timed out |
1582 ms |
1156 KB |
Time limit exceeded |
| 33 |
Execution timed out |
1544 ms |
980 KB |
Time limit exceeded |
| 34 |
Execution timed out |
1582 ms |
1108 KB |
Time limit exceeded |
| 35 |
Execution timed out |
1568 ms |
3192 KB |
Time limit exceeded |
| 36 |
Execution timed out |
1580 ms |
2892 KB |
Time limit exceeded |
| 37 |
Execution timed out |
1577 ms |
2044 KB |
Time limit exceeded |
| 38 |
Execution timed out |
1580 ms |
3024 KB |
Time limit exceeded |
| 39 |
Execution timed out |
1585 ms |
1208 KB |
Time limit exceeded |
| 40 |
Execution timed out |
1577 ms |
1336 KB |
Time limit exceeded |
| 41 |
Execution timed out |
1583 ms |
1820 KB |
Time limit exceeded |
| 42 |
Execution timed out |
1588 ms |
1748 KB |
Time limit exceeded |
| 43 |
Execution timed out |
1578 ms |
2224 KB |
Time limit exceeded |
| 44 |
Execution timed out |
1583 ms |
2792 KB |
Time limit exceeded |
| 45 |
Execution timed out |
1581 ms |
1936 KB |
Time limit exceeded |
| 46 |
Execution timed out |
1575 ms |
2888 KB |
Time limit exceeded |
| 47 |
Execution timed out |
1552 ms |
3084 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1569 ms |
2788 KB |
Time limit exceeded |
| 49 |
Execution timed out |
1582 ms |
3052 KB |
Time limit exceeded |
| 50 |
Execution timed out |
1559 ms |
1236 KB |
Time limit exceeded |
