Submission #8553

#	Time	Username	Problem	Language	Result	Execution time	Memory
8553		gs14004	택배 (KOI13_delivery)	C++98	100 / 100	12 ms	1720 KiB

delivery

#include <cstdio>
#include <queue>
#include <vector>
#include <algorithm>
using namespace std;

struct good{int s,e,x;}d[10005];
bool cmp(good a, good b){
    return a.s == b.s ? a.e > b.e : a.s < b.s;
}
bool operator<(good a, good b){return a.e < b.e;}

int n,c,m;
int a[2005],cdone;

priority_queue<good> pq;

int main(){
    scanf("%d %d %d",&n,&c,&m);
    for (int i=0; i<m; i++) {
        scanf("%d %d %d",&d[i].s,&d[i].e,&d[i].x);
        a[d[i].s] += d[i].x;
        a[d[i].e] -= d[i].x;
        cdone += d[i].x;
    }
    a[1] -= c;
    a[n] += c;
    sort(d,d+m,cmp);
    for (int i=1; i<=n; i++) {
        a[i] += a[i-1];
    }
    int piv = 0;
    for (int i=1; i<=n; i++) {
        while (piv < m && d[piv].s <= i) {
            pq.push(d[piv]);
            piv++;
        }
        while (a[i] > 0) {
            good t = pq.top();
            pq.pop();
            int dx = min(t.x,a[i]);
            for (int j=i; j<t.e; j++) {
                a[j] -= dx;
            }
            cdone -= dx;
            t.x -= dx;
            if(t.x > 0) pq.push(t);
        }
    }
    printf("%d",cdone);
}

• Subtask 1: 15 / 15
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 23 / 23
• Subtask 5: 25 / 25