제출 #104249

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
104249		dupreez	Lightning Rod (NOI18_lightningrod)	C++14	66 / 100	2068 ms	116856 KiB

Main

#include <iostream>
#include <algorithm>
#include <cstring>
#include <sstream>
#include <map>
#include <queue>
#include <vector>
#include <stack>
#define mk make_pair
#define pb push_back
using namespace std;
typedef long long int ll;
typedef pair<ll, ll> pos;
const ll MOD = 1000000007,N=10000010;
int n,mxv,st[N],sti;

void push(int v1) {
	st[sti] = v1;
	sti++;
}

void pop() {
	sti--;
}

int main() {
	scanf("%d", &n);
	for (int i = 1; i <= n; i++) { 
		int v1, v2;
		scanf("%d%d", &v1,&v2);
		if (i == 1) {
			mxv = v1 + v2;
			push(v1 - v2);
		}
		else if (mxv < v1 + v2) {
			while (sti!=0 && st[sti-1] >= v1 - v2)pop();
			push(v1 - v2);
			mxv = v1 + v2;
		}
	}
	cout << sti << endl;
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
lightningrod.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &v1,&v2);
   ~~~~~^~~~~~~~~~~~~~~~~

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• Subtask 2: 7 / 7
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