poj1456 Supermarket

#include <algorithm>
#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
int n, dui[10005], k;
struct Node{
    int p, d;
}nd[10005];
bool cmp(Node x, Node y){
    if(x.d==y.d)    return x.p<y.p;
    else    return x.d<y.d;
}
int cmp2(int x, int y){
    return x>y;
}
int main(){
    while(scanf("%d", &n)!=EOF){
        k = 0;
        for(int i=1; i<=n; i++)
            scanf("%d %d", &nd[i].p, &nd[i].d);
        sort(nd+1, nd+1+n, cmp);
        for(int i=1; i<=n; i++){
            if(k<nd[i].d){
                dui[++k] = nd[i].p;
                push_heap(dui+1, dui+1+k, cmp2);
            }
            else if(nd[i].p>dui[1]){
                pop_heap(dui+1, dui+1+k, cmp2);
                dui[k] = nd[i].p;
                push_heap(dui+1, dui+1+k, cmp2);
            }
        }
        int ans=0;
        while(k){
            ans += dui[1];
            pop_heap(dui+1, dui+1+k, cmp2);
            k--;
        }
        printf("%d\n", ans);
    }
    return 0;
}

#include <algorithm>
#include <iostream>
#include <cstdio>
using namespace std;
int n, fa[10005], ans;
struct Node{
    int p, d;
}nd[10005];
bool cmp(Node x, Node y){
    return x.p>y.p;
}
int myfind(int x){
    return fa[x]==x?x:fa[x]=myfind(fa[x]);
}
int main(){
    while(scanf("%d", &n)!=EOF){
        for(int i=1; i<=n; i++)
            scanf("%d %d", &nd[i].p, &nd[i].d);
        sort(nd+1, nd+1+n, cmp);
        for(int i=0; i<=10000; i++)
            fa[i] = i;
        ans = 0;
        for(int i=1; i<=n; i++)
            if(myfind(nd[i].d)){
                ans += nd[i].p;
                fa[myfind(nd[i].d)] = myfind(nd[i].d) - 1;
            }
        printf("%d\n", ans);
    }
    return 0;
}