Submission #145547

#	Time	Username	Problem	Language	Result	Execution time	Memory
145547		surface03	비용 (KOI11_cost)	C++14	0 / 24	10 ms	632 KiB

cost

#include<bits/stdc++.h>
using namespace std;
 
const int LM=105;
struct data{
    int a,b,w;
    bool operator<(const data&r)const{
        return w<r.w;
    }
};
int N,ans,group[LM];
 
vector<data>A;
 
int Find(int n){
    if(group[n]==n)return n;
    return group[n]=Find(group[n]);
}
int main(){
    scanf("%d",&N);
    int i,j,w;
    for(i=1;i<=N;i++)group[i]=i;
    for(i=1;i<=N;i++){
        for(j=1;j<=N;j++){
            scanf("%d",&w);
            if(i<j)A.push_back({i,j,w});
        }
    }
    sort(A.begin(),A.end());
    for(auto&obj:A){
        int ag=Find(obj.a),bg=Find(obj.b);
        int w=obj.w;
        if(ag==bg)continue;
        ans+=w;
        group[bg]=ag;
    }
    printf("%d",ans);
    return 0;
}

Compilation message (stderr)

cost.cpp: In function 'int main()':
cost.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
     ~~~~~^~~~~~~~~
cost.cpp:25:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&w);
             ~~~~~^~~~~~~~~

• Subtask 1: 0 / 4.8
• Subtask 2: 0 / 7.2
• Subtask 3: 0 / 12