Submission #90021

#	Time	Username	Problem	Language	Result	Execution time	Memory
90021		Bodo171	결혼 문제 (IZhO14_marriage)	C++14	80 / 100	1575 ms	12316 KiB

marriage

#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
const int nmax=30005;
vector<int> v[nmax];
int l[nmax],r[nmax];
bool viz[nmax];
bool changed;
int n,m,i,j,k,a,b,p,cupl,ans;
bool cup(int x)
{
    if(viz[x])
        return 0;
    viz[x]=1;
    for(int it=0;it<v[x].size();it++)
        if(!r[v[x][it]])
    {
        l[x]=v[x][it];
        r[v[x][it]]=x;
        return 1;
    }
    for(int it=0;it<v[x].size();it++)
        if(cup(r[v[x][it]]))
    {
        l[x]=v[x][it];
        r[v[x][it]]=x;
        return 1;
    }
    return 0;
}
void cc()
{
    changed=1;
    while(changed)
    {
        changed=0;
        for(j=p; j<=i; j++)
            if((!l[j])&&cup(j))
            {
                cupl++;
                changed=1;
            }
        for(j=p; j<=i; j++)
            viz[j]=0;

    }
}
int main()
{
    //freopen("data.in","r",stdin);
    ios_base::sync_with_stdio(false);
    cin>>n>>m>>k;
    for(i=1;i<=k;i++)
    {
        cin>>a>>b;
        v[a].push_back(b);
    }
    p=1;
    for(i=1;i<=n;i++)
    {
        cc();
        while(cupl==m)
        {
            if(l[p])
                r[l[p]]=0,cupl--;
            p++;
            cc();

        }
        ans+=(p-1);
    }
    cout<<ans;
    return 0;
}

Compilation message (stderr)

marriage.cpp: In function 'bool cup(int)':
marriage.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int it=0;it<v[x].size();it++)
                  ~~^~~~~~~~~~~~
marriage.cpp:23:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int it=0;it<v[x].size();it++)
                  ~~^~~~~~~~~~~~

• Subtask 1: 80 / 100