oj.uz

Submission #443064

# Submission time Handle Problem Language Result Execution time Memory
443064 2021-07-09T15:01:47 Z leaked Marriage questions (IZhO14_marriage) C++14
100 / 100
 1122 ms 2988 KB 
#include <bits/stdc++.h>
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("-O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define vec vector
#define sz(x) ( int)x.size()
#define m_p make_pair
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;
typedef long long ll;
typedef pair<ll, int> pli;
typedef pair<int,ll> pil;
typedef pair<int,int> pii;
typedef unsigned long long ull;
auto rng=bind(uniform_int_distribution<int>(1,1000),mt19937(time(0)));
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
const int N=3e4+1;
const int K=165;
const int M=2001;
vec<int> g[N+M];
int uk;
int mt[N+M];
int h[N+M],u[N+M],tt,n,m;
int tr;
vec<int>rem;
bool kuhn(int v){
    if(u[v]==tt) return 0;
    u[v]=tt;
    for(auto &z : g[v]){
        if(h[z] && (mt[z]==-1 || kuhn(mt[z]))){
            mt[z]=v;mt[v]=z;
            return 1;
        }
    }
    return 0;
}
signed main(){
//    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int k;
    scanf("%d%d%d",&n,&m,&k);
    for(int i=0;i<k;i++){
        int v,u;
        scanf("%d%d",&v,&u);--v;--u;
        g[v].pb(u+n);
        g[u+n].pb(v);
    }
    fill(mt,mt+n+m,-1);
    for(int i=0;i<m;i++) h[i+n]=1,rem.pb(i+n);
    int r=-1;
    int c=0;
    ll ans=0;
    auto check=[&](){
        tt++;
        return kuhn(rem.back());
    };
    for(int l=0;l<n;l++){
        if(l){
            h[l-1]=0;
            if(mt[l-1]!=-1){
                tt++;
                rem.pb(mt[l-1]);
                mt[rem.back()]=-1;
                mt[l-1]=-1;
            }
        }
        while(sz(rem) && check()){
            rem.pop_back();
        }
        while(r<n && sz(rem)){
            r++;tt++;h[r]=1;
            while(sz(rem) && check()){
                rem.pop_back();
            }
        }
        ans+=n-r;
    }
    printf("%lld",ans);
    return 0;
}

/*
5
1 2
2 3
3 4
4 5
5 1
*/

Compilation message

marriage.cpp: In function 'int main()':
marriage.cpp:56:9: warning: unused variable 'c' [-Wunused-variable]
   56 |     int c=0;
      |         ^
marriage.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     scanf("%d%d%d",&n,&m,&k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
marriage.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         scanf("%d%d",&v,&u);--v;--u;
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 972 KB Output is correct
3 Correct 1 ms 972 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 972 KB Output is correct
6 Correct 1 ms 972 KB Output is correct
7 Correct 1 ms 972 KB Output is correct
8 Correct 1 ms 972 KB Output is correct
9 Correct 1 ms 972 KB Output is correct
10 Correct 1 ms 972 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 972 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 1 ms 972 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 972 KB Output is correct
19 Correct 4 ms 1100 KB Output is correct
20 Correct 2 ms 972 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 1 ms 972 KB Output is correct
24 Correct 1 ms 972 KB Output is correct
25 Correct 34 ms 1240 KB Output is correct
26 Correct 5 ms 1120 KB Output is correct
27 Correct 1 ms 972 KB Output is correct
28 Correct 1 ms 972 KB Output is correct
29 Correct 5 ms 1100 KB Output is correct
30 Correct 4 ms 1100 KB Output is correct
31 Correct 456 ms 1788 KB Output is correct
32 Correct 11 ms 1100 KB Output is correct
33 Correct 1 ms 1100 KB Output is correct
34 Correct 2 ms 1100 KB Output is correct
35 Correct 169 ms 2156 KB Output is correct
36 Correct 120 ms 2124 KB Output is correct
37 Correct 1122 ms 1860 KB Output is correct
38 Correct 44 ms 2372 KB Output is correct
39 Correct 65 ms 1360 KB Output is correct
40 Correct 4 ms 1408 KB Output is correct
41 Correct 11 ms 1612 KB Output is correct
42 Correct 14 ms 1772 KB Output is correct
43 Correct 18 ms 1808 KB Output is correct
44 Correct 33 ms 2420 KB Output is correct
45 Correct 13 ms 2156 KB Output is correct
46 Correct 95 ms 2936 KB Output is correct
47 Correct 36 ms 2712 KB Output is correct
48 Correct 34 ms 2652 KB Output is correct
49 Correct 151 ms 2988 KB Output is correct
50 Correct 201 ms 1456 KB Output is correct