Submission #63151

#	Time	Username	Problem	Language	Result	Execution time	Memory
63151		khsoo01	화살표 그리기 (KOI18_arrowH)	C++11	100 / 100	72 ms	16632 KiB

arrow

#include<bits/stdc++.h>
using namespace std;

const int N = 100005, inf = 2e9;

int n;

long long ans;

vector<int> v[N];

int main()
{
	scanf("%d",&n);
	for(int i=1;i<=n;i++) {
		int A, B;
		scanf("%d%d",&A,&B);
		v[B].push_back(A);
	}
	for(int i=1;i<=n;i++) {
		sort(v[i].begin(), v[i].end());
		if(v[i].size() == 1) continue;
		for(int j=0;j<(int)v[i].size();j++) {
			int T = inf;
			if(j != 0) T = min(T, v[i][j] - v[i][j-1]);
			if(j != (int)v[i].size() - 1) T = min(T, v[i][j+1] - v[i][j]);
			ans += T;
		}
	}
	printf("%lld\n",ans);
}

Compilation message (stderr)

arrow.cpp: In function 'int main()':
arrow.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
arrow.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&A,&B);
   ~~~~~^~~~~~~~~~~~~~

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