Submission #145544

#	Time	Username	Problem	Language	Result	Execution time	Memory
145544		surface03	화살표 그리기 (KOI18_arrowH)	C++14	100 / 100	52 ms	5976 KiB

arrow

#include<bits/stdc++.h>
using namespace std;
vector<long long>v[100010];
int main(){
    int n,i,j,x,y,len;
    long long ans=0;
    scanf("%d",&n);
    for(i=1;i<=n;i++){
        scanf("%d%d",&x,&y);
        v[y].push_back(x);
    }
    for(i=1;i<=n;i++){
        sort(v[i].begin(),v[i].end());
    }
    for(i=1;i<=n;i++){
        if(v[i].size()<=1)continue;
        len=v[i].size();
        for(j=1;j<len-1;j++){
            ans+=min(v[i][j]-v[i][j-1],v[i][j+1]-v[i][j]);
        }
        ans+=v[i][1]-v[i][0];
        ans+=v[i][len-1]-v[i][len-2];
    }
    printf("%lld",ans);
}

Compilation message (stderr)

arrow.cpp: In function 'int main()':
arrow.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
arrow.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&y);
         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 12 / 12
• Subtask 3: 29 / 29
• Subtask 4: 38 / 38