제출 #830325

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
830325		mindiyak	말 (IOI15_horses)	C++14	0 / 100	1562 ms	20176 KiB

horses

#include "horses.h"
#include <vector>

using namespace std;
typedef long long ll;


vector<ll> x;
vector<ll> y;
vector<ll> num_h;
int n;
int M = 1e9+7;

ll multi(ll a,ll b){
	return ((a%M)*(b*M))%M;
}

int calc(){
	num_h = vector<ll>();
	for(int i=0;i<n;i++)num_h.push_back(multi(x[i],((i==0)?1:num_h[i-1])));

	ll MX = 0;
	for(int i=0;i<n;i++){
		MX = max(MX,multi(num_h[i],y[i]));
	}
	int ans = MX%((int)1e9+7);
	return ans;
}

int init(int N, int X[], int Y[]) {
	n = N;
	for(int i=0;i<N;i++)x.push_back(X[i]);
	for(int i=0;i<N;i++)y.push_back(Y[i]);

	return calc();
}

int updateX(int pos, int val) {	
	x[pos]=val;
	return calc();
}

int updateY(int pos, int val) {
	y[pos]=val;
	return calc();
}

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int calc()':
horses.cpp:26:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   26 |  int ans = MX%((int)1e9+7);
      |            ~~^~~~~~~~~~~~~

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