Submission #65657

#	Time	Username	Problem	Language	Result	Execution time	Memory
65657		sebinkim	화살표 그리기 (KOI18_arrowH)	C++14	100 / 100	71 ms	17180 KiB

arrow

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

vector <ll> V[101010];
ll n, ans;

int main()
{
	ll i, j, a, b;
	
	scanf("%lld", &n);
	
	for(i=0; i<n; i++){
		scanf("%lld%lld", &a, &b);
		V[b].push_back(a);
	}
	
	for(i=1; i<=n; i++){
		if(V[i].size() < 2) continue;
		
		sort(V[i].begin(), V[i].end());
		
		for(j=0; j<V[i].size(); j++){
			if(j == 0) ans += V[i][j+1] - V[i][j];
			else if(j + 1 == V[i].size()) ans += V[i][j] - V[i][j-1];
			else ans += min(V[i][j+1] - V[i][j], V[i][j] - V[i][j-1]);
		}
	}
	
	printf("%lld\n", ans);
	
	return 0;
}

Compilation message (stderr)

arrow.cpp: In function 'int main()':
arrow.cpp:26:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0; j<V[i].size(); j++){
            ~^~~~~~~~~~~~
arrow.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    else if(j + 1 == V[i].size()) ans += V[i][j] - V[i][j-1];
            ~~~~~~^~~~~~~~~~~~~~
arrow.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld", &n);
  ~~~~~^~~~~~~~~~~~
arrow.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~~~~~

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