제출 #294246

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
294246		Lawliet	Nuclearia (CEOI15_nuclearia)	C++17	40 / 100	321 ms	62712 KiB

nuclearia

#include <bits/stdc++.h>

using namespace std;
typedef long long int lli;

int n, m, k, q;

vector<lli> s;
vector<lli> indep, fact;

int main()
{
	scanf("%d %d %d",&n,&m,&k);

	s.resize( n + 2 , 0 );
	indep.resize( n + 2 , 0 ); fact.resize( n + 2 , 0 );

	for(int i = 1 ; i <= k ; i++)
	{
		lli x, a, b;
		scanf("%lld %*d %lld %lld",&x,&a,&b);

		lli L = x - a/b;
		L = max( L , 1LL );

		lli R = x + a/b;
		R = min( R , n*1LL );

		lli valLeft = a - b*x;

		fact[L] += b; fact[x + 1] -= b;
		indep[L] += valLeft; indep[x + 1] -= valLeft;

		lli valRight = a + b*x;

		fact[x + 1] -= b; fact[R + 1] += b;
		indep[x + 1] += valRight; indep[R + 1] -= valRight;
	}

	lli sumFact = 0;
	lli sumIndep = 0;

	for(int i = 1 ; i <= n ; i++)
	{
		sumFact += fact[i];
		sumIndep += indep[i];

		s[i] = s[i - 1] + sumIndep;
		s[i] += sumFact*i;
	}

	scanf("%d",&q);

	while( q-- )
	{
		int xa, xb;
		scanf("%d %*d %d %*d",&xa,&xb);

		lli area = xb - xa + 1;
		lli sum = s[xb] - s[xa - 1];

		lli ans = sum/area;
		if( (sum%area)*2 >= area ) ans++;

		printf("%lld\n",ans);
	}
}

컴파일 시 표준 에러 (stderr) 메시지

nuclearia.cpp: In function 'int main()':
nuclearia.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |  scanf("%d %d %d",&n,&m,&k);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~
nuclearia.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |   scanf("%lld %*d %lld %lld",&x,&a,&b);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nuclearia.cpp:52:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   52 |  scanf("%d",&q);
      |  ~~~~~^~~~~~~~~
nuclearia.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |   scanf("%d %*d %d %*d",&xa,&xb);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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