Submission #631941

#	Time	Username	Problem	Language	Result	Execution time	Memory
631941		Stavab	Horses (IOI15_horses)	C++14	17 / 100	1576 ms	18364 KiB

horses

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

using namespace std;

vector<long long> mult, y, x;

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

int init(int N, int X[], int 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 < mult.size(); i++)
        mult[i] = mult[i - 1] * x[i];
    return ans();
}

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

Compilation message (stderr)

horses.cpp: In function 'int ans()':
horses.cpp:11:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i = 0; i < mult.size(); i++)
      |                    ~~^~~~~~~~~~~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:41:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for(int i = pos; i < mult.size(); i++)
      |                      ~~^~~~~~~~~~~~~

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