Submission #34836

#	Time	Username	Problem	Language	Result	Execution time	Memory
34836		simotion	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	0 ms	2016 KiB

skyscraper

#include <bits/stdc++.h>
#define ll long long
#define mp make_pair
#define pi pair<int,int>
#define fi first
#define se second
#define SIZ 31
#define INF 1e9
using namespace std;
int n,m;
int b[SIZ],p[SIZ];
int t1,t2;
bool visited[SIZ];
int dist[SIZ];
int main() {
    scanf("%d %d",&n,&m);
    for(int i=0;i<m;i++) {
        scanf("%d %d",&b[i],&p[i]);
        dist[i]=INF;
    }
    dist[0]=0;
    priority_queue<pi,vector<pi >,greater<pi > > pq;
    pq.push(mp(0,0));
    while(!pq.empty()&&!visited[1]) {
        auto now=pq.top();
        pq.pop();
        if(visited[now.se]) continue;
        visited[now.se]=true;
        int loc=b[now.se],jmp=p[now.se];
        for(int i=0;i<m;i++) {
            if(loc!=b[i]&&abs(loc-b[i])%jmp==0) {
                int cand=now.fi+abs(loc-b[i])/jmp;
                pq.push(mp(cand,i));
                dist[i]=min(dist[i],cand);
            }
        }
    }
    if(!visited[1]) printf("-1");
    else printf("%d",dist[1]);
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:16:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&m);
                         ^
skyscraper.cpp:18:35: 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: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43