Submission #409157

#	Time	Username	Problem	Language	Result	Execution time	Memory
409157		enerelt14	Travelling Merchant (APIO17_merchant)	C++14	0 / 100	69 ms	1728 KiB

merchant

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define ss second
#define ff first
using namespace std;
int n, m, k, b[105][1005], s[105][1005];
vector<pair<int, int> >out[105];
vector<pair<int, int> >in[105];
int patho[105], pathi[105];
void dijkstraa(int s){
  	bool vis[100005]={0};
  	priority_queue<pair<int, int> >pq;
  	pq.push(mp(0, s));
  	while(!pq.empty()){
      	int u = pq.top().ss;
      	int cost = -pq.top().ff;
      	pq.pop();
      	patho[u]=cost;
      	vis[u] = 1;
      	for(int i = 0; i < out[u].size(); i++){
        	int v = out[u][i].ff;
          	int e = out[u][i].ss;
          	if(!vis[v]) pq.push(mp(-(cost + e), v));
      	}
      	while(!pq.empty() && vis[pq.top().ss]) pq.pop();
  	}
}
void dijkstrab(int s){
  	bool vis[100005]={0};
  	priority_queue<pair<int, int> >pq;
  	pq.push(mp(0, s));
  	while(!pq.empty()){
      	int u = pq.top().ss;
      	int cost = -pq.top().ff;
      	pq.pop();
      	pathi[u]=cost;
      	vis[u] = 1;
      	for(int i = 0; i < in[u].size(); i++){
        	int v = in[u][i].ff;
          	int e = in[u][i].ss;
          	if(!vis[v]) pq.push(mp(-(cost + e), v));
      	}
      	while(!pq.empty() && vis[pq.top().ss]) pq.pop();
  	}
}
int main(){
	cin>>n>>m>>k;
	for (int i=1;i<=n;i++)for (int j=1;j<=k;j++)cin>>b[i][j]>>s[i][j];
	for (int i=1;i<=m;i++){
		int v, w, t;
		cin>>v>>w>>t;
		out[v].pb(mp(w, t));
		in[w].pb(mp(v, t));
	}
	dijkstraa(1);
	dijkstrab(1);
	int res=0;
	for (int i=2;i<=n;i++){
		int p=patho[i]+pathi[i], r=0;
		for (int j=1;j<=k;j++)r=max(r, s[i][j]-b[1][j]);
		res=max(res, r/p);
	}
	cout<<res;
}

Compilation message (stderr)

merchant.cpp: In function 'void dijkstraa(int)':
merchant.cpp:21:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |        for(int i = 0; i < out[u].size(); i++){
      |                       ~~^~~~~~~~~~~~~~~
merchant.cpp: In function 'void dijkstrab(int)':
merchant.cpp:39:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |        for(int i = 0; i < in[u].size(); i++){
      |                       ~~^~~~~~~~~~~~~~

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