제출 #631935

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
631935		Stavab	말 (IOI15_horses)	C++14	컴파일 에러	0 ms	0 KiB

horses

#include <vector>

using namespace std;

vector<long long> mult, y, x;

long long ans()
{
    long long maxVal = 0;
    for(int i = 0; i < mult.size(); i++)
    {
        maxVal = max(maxVal, mult[i]*y[i] % 1000000007);
    }
    
    return maxVal;
}

long long init(int N, vector<long long> X, vector<long long> Y)
{
    mult.assign(N, 0);
    mult[0] = X[0];
    x.assign(N, 0);
    x[0] = X[0];
    y.assign(N, 0);
    y[0] = Y[0];
    
    for(int i = 1; i < N; i++)
    {
        mult[i] = (mult[i - 1] * X[i]) % 1000000007;
        y[i] = Y[i];
        x[i] = X[i];
    }
    
    return ans();
}

int updateX(int pos, int val)
{
    x[pos] = val;
    for(int i = pos; i < N; i++)
        mult[i] = mult[i - 1] * x[i];
    return ans();
}

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

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'long long int ans()':
horses.cpp:10:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i = 0; i < mult.size(); i++)
      |                    ~~^~~~~~~~~~~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:40:26: error: 'N' was not declared in this scope
   40 |     for(int i = pos; i < N; i++)
      |                          ^
horses.cpp:42:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   42 |     return ans();
      |            ~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:48:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   48 |     return ans();
      |            ~~~^~