La 3415 二分图

#include<cstdio>
#include<cstring>
#include<iostream>
#include<cmath>
using namespace std;

const int maxn = 505;
struct student{
    int height;
    char gender;
    char m[105];
    char s[105];
}stu[maxn];
bool G[maxn][maxn];
int n,ans;
int link[maxn];
int vis[maxn];

void init(){
    memset(link,-1,sizeof(link));
    memset(G,0,sizeof(G));
}
bool dfs(int u){
    
    for(int v=1;v<=n;v++){
        if(G[u][v] && !vis[v]){
            vis[v] = true;  //cout<<u<<v<<link[v]<<endl;
            if(link[v] == -1 || dfs(link[v])){
                link[v] = u;  //cout<<u<<endl;
                return true;
            }
        }    
    }
    return false;
}
void KM(){
    ans = 0;  
    for(int i=1;i<=n;i++){
        memset(vis,0,sizeof(vis));
        if(dfs(i)) ans++;
     }
}
int main()
{
    //if(freopen("input.txt","r",stdin)== NULL) printf("Error\n");
    int T;
    cin>>T;
    while(T--){
        cin>>n;
        init();
        for(int i=1;i<=n;i++){
            cin>>stu[i].height;
            cin>>stu[i].gender;
            cin>>stu[i].m;
            cin>>stu[i].s;
        }
        for(int i=1;i<=n;i++)
           for(int j=i+1;j<=n;j++){
                int a = stu[i].height - stu[j].height;
                int b = stu[i].gender - stu[j].gender;
                int c = strcmp(stu[i].m,stu[j].m);
                int d = strcmp(stu[i].s,stu[j].s);
                if( fabs(a)<=40 && b && !c && d){
                    if(stu[i].gender == 'M') G[i][j] = true;
                    else                 G[j][i] = true;
                }
           }
           KM(); 
           cout<<n-ans<<endl;
    } 
    
}