Submission #866851

#	Time	Username	Problem	Language	Result	Execution time	Memory
866851		1075508020060209tc	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	10 / 100	1 ms	1368 KiB

skyscraper

#include<bits/stdc++.h>
using namespace std;
#define int long long
int n;int m;
long long dis[30100];
vector<int>e[30100];
int vis[30100];
int ar[30100];
int br[30100];
signed main(){
cin.tie(0);
ios_base::sync_with_stdio(0);
cin>>n>>m;
for(int i=0;i<m;i++){
    cin>>ar[i]>>br[i];
    e[ar[i]].push_back(br[i]);
}
for(int i=1;i<n;i++){
    dis[i]=2000000000;
}
for(int ttt=1;ttt<=n;ttt++){
    int nw=n;
    for(int i=0;i<n;i++){
        if(vis[i]){continue;}
        if(nw==n||dis[i]<dis[nw]){
            nw=i;
        }
    }
    if(nw==n){break;}
    if(dis[nw]>1000000000){break;}
    vis[nw]=1;
    for(int i=0;i<e[nw].size();i++){
        int d=e[nw][i];
        for(int t=1;nw+t*d<n;t++){
            int v=nw+t*d;
            dis[v]=min(dis[v],dis[nw]+t);
        }
        for(int t=1;nw-t*d>=0;t++){
            int v=nw-t*d;
            dis[v]=min(dis[v],dis[nw]+t);
        }
    }
}
if(dis[ar[1]]>1000000000){
    cout<<-1<<endl;
    return 0;
}
cout<<dis[ar[1]]<<endl;

}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:32:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i=0;i<e[nw].size();i++){
      |                 ~^~~~~~~~~~~~~

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