Submission #72843

#	Time	Username	Problem	Language	Result	Execution time	Memory
72843		TuGSGeReL	Crocodile's Underground City (IOI11_crocodile)	C++14	100 / 100	932 ms	45180 KiB

crocodile

#include "crocodile.h"
#include<bits/stdc++.h>
#define ll long long
#define mp make_pair
#define pub push_back
#define pob pop_back
#define ss second
#define ff first
#define ext exit(0)
using namespace std;
int i,mn1[100001],mn2[100001];
vector<pair<int,int> >v[100001];
priority_queue<pair<int,int> >q;
int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){
	for(i=0;i<M;i++){
		v[R[i][0]].pub(mp(R[i][1],L[i]));
		v[R[i][1]].pub(mp(R[i][0],L[i]));
	}
	memset(mn2,63,sizeof mn2);
	memset(mn1,63,sizeof mn1);
	for(i=0;i<K;i++){
		q.push(mp(0,P[i]));
		mn1[P[i]]=0;
		mn2[P[i]]=0;
	}
	while(!q.empty()){
		int idx=q.top().ss,cs=-q.top().ff;
		q.pop();
		if(cs>mn2[idx]) continue;
		for(i=0;i<v[idx].size();i++){
			int idx1=v[idx][i].ff,cst1=v[idx][i].ss;
			int cstdt=mn2[idx1];
			mn2[idx1]=min(mn2[idx1],cs+cst1);
			if(mn2[idx1]<mn1[idx1])swap(mn2[idx1],mn1[idx1]);
			if(mn2[idx1]!=cstdt) q.push(mp(-mn2[idx1],idx1));
		}
	}
	return mn2[0];
}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:30:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(i=0;i<v[idx].size();i++){
           ~^~~~~~~~~~~~~~

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