Submission #205519

#	Time	Username	Problem	Language	Result	Execution time	Memory
205519		kshitij_sodani	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	36 / 100	423 ms	262148 KiB

skyscraper

#include <iostream>
#include <bits/stdc++.h>
 
using namespace std;
typedef int64_t llo;
#define mp make_pair
#define pb push_back
#define a first
#define b second
#define endl "\n"
 
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n,m;
	cin>>n>>m;
	int b[m];
	int p[m];
	//map<pair<int,int>,int> aa;
	vector<pair<int,int>> adj[n];
	for(int i=0;i<m;i++){
		cin>>b[i]>>p[i];
		int jj=1;
		for(int j=b[i]-p[i];j>=0;j=j-p[i]){
			adj[b[i]].pb(mp(j,jj));
			jj+=1;
		}
		jj=1;
		for(int j=b[i]+p[i];j<n;j=j+p[i]){
			adj[b[i]].pb(mp(j,jj));
			jj+=1;
		}
	}

	int dis[n];
	for(int i=0;i<n;i++){
		dis[i]=-1;
	}
	dis[b[0]]=0;
	priority_queue<pair<int,int>> aaa;
	aaa.push(mp(0,b[0]));

	while(aaa.size()>0){
		pair<int,int> x=aaa.top();
		aaa.pop();
		for(int j=0;j<adj[x.b].size();j++){
			pair<int,int> nn=adj[x.b][j];
			if(dis[nn.a]==-1 or dis[nn.a]>dis[x.b]+nn.b){
				dis[nn.a]=dis[x.b]+nn.b;
				aaa.push(mp(dis[nn.a],nn.a));
			}
		}
	}
	if(dis[b[1]]==-1){
		cout<<-1<<endl;
		return 0;
	}
	if(b[0]==b[1]){
		cout<<0<<endl;
		return 0;
	}
	
	cout<<dis[b[1]]<<endl;




	return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<adj[x.b].size();j++){
               ~^~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43