Submission #86573

#	Time	Username	Problem	Language	Result	Execution time	Memory
86573		tjdgus4384	주유소 (KOI16_gas)	C++14	100 / 100	57 ms	52132 KiB

gas

#include<cstdio>
#include<vector>
#include<string.h>
#include<algorithm>
#include<queue>
using namespace std;
typedef pair<long long, long long> pi;
typedef pair<pair<long long, long long>, long long> ppi;
long long p[2501];
long long dist[2501][2501];
vector<pi> v[2501];
priority_queue<ppi , vector<ppi>, greater<ppi> > pq;

int main()
{
    int n, m, a, b, c;
    scanf("%d %d", &n, &m);
    for(int i = 1;i <= n;i++) scanf("%lld", &p[i]);
    for(int i = 0;i < m;i++)
    {
        scanf("%d %d %d", &a, &b, &c);
        v[a].push_back({b, c});
        v[b].push_back({a, c});
    }
    //dijkstra
    //(지금까지돈, 도시, 지금까지최소기름값)
    pq.push({{0, 1}, p[1]});
    memset(dist, -1, sizeof(dist));
    while(!pq.empty())
    {
        long long s = pq.top().first.first;
        long long f = pq.top().first.second;
        long long t = pq.top().second;
        pq.pop();
        if(dist[f][t] != -1) continue;
        dist[f][t] = s;
        if(f == n)
        {
            printf("%lld", s);
            return 0;
        }
        for(int i = 0;i < v[f].size();i++)
        {
            if(dist[v[f][i].first][min(t, p[v[f][i].first])] != -1) continue;
            pq.push({{s + t * v[f][i].second, v[f][i].first}, min(t, p[v[f][i].first])});
        }
    }
}

Compilation message (stderr)

gas.cpp: In function 'int main()':
gas.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0;i < v[f].size();i++)
                       ~~^~~~~~~~~~~~~
gas.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
gas.cpp:18:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1;i <= n;i++) scanf("%lld", &p[i]);
                               ~~~~~^~~~~~~~~~~~~~~
gas.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", &a, &b, &c);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 15 / 15
• Subtask 3: 16 / 16
• Subtask 4: 24 / 24
• Subtask 5: 27 / 27