제출 #83334

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
83334		farukkastamonuda	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	100 / 100	233 ms	66236 KiB

skyscraper

#include <bits/stdc++.h>
#define li 30005
#define inf 2000001000
#define md 1000000007
#define lo long long
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define ii pair<lo int,lo int>
using namespace std;
int n,m,B[li],P[li],dist[li];
set<int> S[li];
vector< pair<int,int> > v[li];
int vis[li];
priority_queue< pair<int,int> > q;
void bfs(){
	for(int i=0;i<n;i++) dist[i]=inf;
	q.push(mp(0,B[0]));
	dist[B[0]]=0;
	while(!q.empty()){
		ii temp=q.top();
		q.pop();
		int seh=temp.se;
		int cst=-temp.fi;
		if(dist[seh]<cst) continue;
		for(int i=0;i<(int)v[seh].size();i++){
			int go=v[seh][i].fi;
			int para=v[seh][i].se;
			if(dist[go]>dist[seh]+para){
				dist[go]=dist[seh]+para;
				q.push(mp(-(dist[go]),go));
			}
		}
	}
}
int main(){
	scanf("%d %d",&n,&m);
	for(int i=0;i<m;i++){
		scanf("%d %d",&B[i],&P[i]);
		S[B[i]].insert(P[i]);
	}
	for(int i=0;i<n;i++){
		for(auto e:S[i]){
			for(int j=i+e;j<n;j+=e){
				v[i].pb(mp(j,(j-i)/e));
				if(S[j].lower_bound(e)!=S[j].end() && *S[j].lower_bound(e)==e) break;
			}
		}
	}
	for(int i=0;i<n;i++){
		for(auto e:S[i]){
			for(int j=i-e;j>=0;j-=e){
				v[i].pb(mp(j,(i-j)/e));
				if(S[j].lower_bound(e)!=S[j].end() && *S[j].lower_bound(e)==e) break;
			}
		}
	}
	bfs();
	if(dist[B[1]]==inf) printf("-1\n");
	else printf("%d\n",dist[B[1]]);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
skyscraper.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&B[i],&P[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~

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