제출 #59119

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
59119		wilwxk	여행하는 상인 (APIO17_merchant)	C++11	0 / 100	1080 ms	2168 KiB

merchant

#include <bits/stdc++.h>
using namespace std;

const int MAXN=105;
const int MAXK=1005;
const long long INF=1e15+9;
long long v[MAXN][MAXK][2];
long long dist[MAXN][MAXN], prof[MAXN][MAXN];
long long g[MAXN][MAXN];
int n, m, k;

void floyd() {
    for(int kk=1; kk<=n; kk++) {
        for(int i=1; i<=n; i++) {
            for(int j=1; j<=n; j++) {
                dist[i][j]=min(dist[i][j], dist[i][kk]+dist[kk][j]);
            }
        }
    }
}

bool testa(long long x) {
    for(int i=1; i<=n; i++) for(int j=1; j<=n; j++) g[i][j]=INF;
    for(int i=1; i<=n; i++) {
        for(int j=1; j<=n; j++) {
            if(dist[i][j]==INF||i==j) continue;
            g[i][j]=(x*dist[i][j])-prof[i][j];
        }
    }



    for(int kk=1; kk<=n; kk++) {
        for(int i=1; i<=n; i++) {
            for(int j=1; j<=n; j++) {
                g[i][j]=min(g[i][j], g[i][kk]+g[kk][j]);
            }
        }
    }

    for(int i=1; i<=n; i++) if(g[i][i]<=0) return 1;
    return 0;
}

int main() {
    scanf("%d %d %d", &n, &m, &k);
    for(int i=1; i<=n; i++) for(int j=1; j<=k; j++) scanf("%lld %lld", &v[i][j][0], &v[i][j][1]);
    for(int i=1; i<=n; i++) for(int j=1; j<=n; j++) dist[i][j]=INF;
    while(m--) { int a, b, c; scanf("%d %d %d", &a, &b, &c); dist[a][b]=min(dist[a][b], (long long)c); }

    floyd();

    for(int i=1; i<=n; i++) {
        for(int j=1; j<=n; j++) {
            for(int kk=1; kk<=k; kk++) {
                prof[i][j]=0; if(dist[i][j]==INF) continue;
                if(v[i][kk][0]==-1||v[j][kk][1]==-1||v[j][kk][1]<v[i][kk][0]) continue;
                prof[i][j]=max(prof[i][j], v[j][kk][1]-v[i][kk][0]);
            }
        }
    }

    long long resp=0;
    for(long long i=1e12; i>0; i/=2) while(testa(resp+i)) {
        resp+=i; //printf("foi %lld\n", resp);
    }

    printf("%lld\n", resp);

}

컴파일 시 표준 에러 (stderr) 메시지

merchant.cpp: In function 'int main()':
merchant.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &n, &m, &k);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:47:58: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=n; i++) for(int j=1; j<=k; j++) scanf("%lld %lld", &v[i][j][0], &v[i][j][1]);
                                                     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:49:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     while(m--) { int a, b, c; scanf("%d %d %d", &a, &b, &c); dist[a][b]=min(dist[a][b], (long long)c); }
                               ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 21
• Subtask 3: 0 / 33
• Subtask 4: 0 / 34