제출 #1004386

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1004386		vjudge1	말 (IOI15_horses)	C++17	17 / 100	1584 ms	14336 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define ll long long
#define mod 1000000007
using namespace std;
int n;
vector<ll> x, y;
ll calc(){
	ll ma = 0;
	ll prmult = 1, prmod = -1, nmod = 0;
	for (int i = 0; i < n; i++){
		prmult *= x[i];
		if (prmult >= mod){
			prmult %= mod;
			prmod = nmod;
			nmod = 0;
		}
		ll res;
		if (prmod != -1){
			ll res = 1ll * (mod + prmult) * y[i];
			nmod = max(nmod, res);
		}
		else{
			ll res = 1ll * prmult * y[i];
			nmod = max(nmod, res);
		}
		
	}
	return max(prmod, nmod) % mod;
}
int init(int N, int X[], int Y[]) {
	n = N;
	x.resize(N), y.resize(N);
	for (int i = 0; i < N; i++){
		x[i] = X[i];
		y[i] = 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 'long long int calc()':
horses.cpp:20:7: warning: declaration of 'res' shadows a previous local [-Wshadow]
   20 |    ll res = 1ll * (mod + prmult) * y[i];
      |       ^~~
horses.cpp:18:6: note: shadowed declaration is here
   18 |   ll res;
      |      ^~~
horses.cpp:24:7: warning: declaration of 'res' shadows a previous local [-Wshadow]
   24 |    ll res = 1ll * prmult * y[i];
      |       ^~~
horses.cpp:18:6: note: shadowed declaration is here
   18 |   ll res;
      |      ^~~
horses.cpp:18:6: warning: unused variable 'res' [-Wunused-variable]
horses.cpp:9:5: warning: unused variable 'ma' [-Wunused-variable]
    9 |  ll ma = 0;
      |     ^~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:38:13: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   38 |  return calc();
      |         ~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:43:13: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   43 |  return calc();
      |         ~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:48:13: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   48 |  return calc();
      |         ~~~~^~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23