la3415(最大独立集)

最大独立集与最小顶点覆盖互补

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

struct my{
   int v;
   int next;
};

struct student{
       int high;
       int num;
       string music;
       string sports;
};


const int maxn=1000+10;
int n,m;
int adj[maxn];
my bian[1000000];
int left1[maxn];
int t[maxn];
int fa;

void myinsert(int u,int v){
     bian[++fa].v=v;
     bian[fa].next=adj[u];
     adj[u]=fa;
}

void init(){
     memset(bian,0,sizeof(bian));
     memset(adj,0,sizeof(adj));
     fa=0;
}

bool cmp(student a,student b){
     if(abs(a.high-b.high)<=40 && a.music==b.music && a.sports!=b.sports) return  true;
     return false;
}

bool match(int u){
     for (int i=adj[u];i;i=bian[i].next){
        int v=bian[i].v;
        if(!t[v]){
            t[v]=true;
            if(!left1[v] || match(left1[v])){
                left1[v]=u;
                return true;
            }
        }
     }
     return false;
}

int KM(){
    memset(left1,0,sizeof(left1));
    int ans=0;
    for (int i=1;i<=n;i++){
        memset(t,0,sizeof(t));
        if(match(i)) ans++;
    }
    return ans;
}

int main(){
    int t;
    int top1;
    int top2;
    scanf("%d",&t);
    while(t--){
        student boy[maxn];
        student girl[maxn];
        init();
        top1=0;
        top2=0;
        int l;
        scanf("%d",&l);
        char male;
        int high;
        for (int p=1;p<=l;p++){
            cin>>high>>male;
            if(male=='M'){
                boy[++top1].high=high;
                boy[top1].num=p;
                cin>>boy[top1].music>>boy[top1].sports;
            }
            else {
                girl[++top2].high=high;
                girl[top2].num=p;
                cin>>girl[top2].music>>girl[top2].sports;
            }
        }
        n=top1;
        m=top2;
        for (int i=1;i<=n;i++){
            for (int j=1;j<=m;j++){
                if(cmp(boy[i],girl[j])){
                    myinsert(i,j);
                }
            }
        }
       /* for (int i=1;i<=n;i++){
                printf("%d ",i);
            for (int j=adj[i];j!=-1;j=bian[j].next){
                printf("%d ",bian[j].v);
            }
        printf("\n");*/

        printf("%d\n",top1+top2-KM());
    }
return 0;
}