Submission #519713

#	Time	Username	Problem	Language	Result	Execution time	Memory
519713		antonioqbab	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	470 ms	71108 KiB

crocodile

#include <bits/stdc++.h>
//#include <crocodile.h>

using namespace std;
using ll = long long;
using pi = pair<int,int>;

int travel_plan(int n, int m, int r[][2], int l[], int k, int p[]){
	vector<vector<pair<int,int>>> G(n);
	vector<int> seen(n);
	for(int i=0;i<m;++i){
		int x,y;
		G[r[i][0]].emplace_back(r[i][1], l[i]);
		G[r[i][1]].emplace_back(r[i][0], l[i]);
	}
	auto comp=[&](pi a, pi b){
		return a.second>b.second;
	};
	priority_queue<pi,vector<pi>,decltype(comp)> PQ(comp);
	for(int i=0;i<k;++i){
		PQ.emplace(p[i], 0);
		++seen[p[i]];
	}
	while(!PQ.empty()){
		int node, cost;
		tie(node, cost)=PQ.top();
		PQ.pop();
		if(++seen[node]==2){
			if(node==0)
			return cost;
			for(auto x:G[node])
			PQ.emplace(x.first,x.second+cost);
		}
	}


}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:12:7: warning: unused variable 'x' [-Wunused-variable]
   12 |   int x,y;
      |       ^
crocodile.cpp:12:9: warning: unused variable 'y' [-Wunused-variable]
   12 |   int x,y;
      |         ^
crocodile.cpp:9:35: warning: control reaches end of non-void function [-Wreturn-type]
    9 |  vector<vector<pair<int,int>>> G(n);
      |                                   ^

• Subtask 1: 46 / 46
• Subtask 2: 43 / 43
• Subtask 3: 11 / 11