Submission #1121844

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121844		SalihSahin	Horses (IOI15_horses)	C++14	0 / 100	39 ms	25804 KiB

horses

#include <bits/stdc++.h>
#define pb push_back
using namespace std;
#include "horses.h"

const long long mod = 1e9 + 7;
const long long inf = 1e18 + 20;

vector<array<long long, 2> > arr;
int n;

array<long long, 2> comp(array<long long, 2> a, array<long long, 2> b){
    if(inf / a[0] >= a[1] && inf / b[0] >= b[1]){
        if(a[0] * a[1] > b[0] * b[1]) return a;
        else return b;
    }
    if(inf / a[0] < a[1] && inf / b[0] < b[1]){
        return a;
    }
    if(inf / a[0] < a[1]) return a;
    else return b;
}

int init(int N, int X[], int Y[]) {
    arr.resize(N);
    n = N;
    for(int i = 0; i < N; i++){
        arr[i] = {X[i], Y[i]};
    }

    long long vl = 1;
    int ind = 0;
    for(int i = N-1; i >= 0; i--){
        vl *= arr[i][0];
        if(vl > mod){
            ind = i;
            break;
        }
    }

    vl = 1;
    long long precarp = 1;
    for(int i = 0; i < ind; i++){
        precarp = (precarp * arr[i][0])%mod;
    }
    array<long long, 2> ans = {0LL, 0LL};
    for(int i = ind; i < N; i++){
        vl *= arr[i][0];
        ans = comp(ans, {vl, arr[i][1]});
    }
    long long calc = (ans[0]%mod) * (ans[1]%mod);
    calc %= mod;
    calc *= precarp;
    calc %= mod;
    int res = calc;
    return res;
}

int updateX(int pos, int val) { 
    int N = n;
    arr[pos][0] = val;
    long long vl = 1;
    int ind = 0;
    for(int i = N-1; i >= 0; i--){
        vl *= arr[i][0];
        if(vl > mod){
            ind = i;
            break;
        }
    }

    vl = 1;
    long long precarp = 1;
    for(int i = 0; i < ind; i++){
        precarp = (precarp * arr[i][0])%mod;
    }
    array<long long, 2> ans = {0LL, 0LL};
    for(int i = ind; i < N; i++){
        vl *= arr[i][0];
        ans = comp(ans, {vl, arr[i][1]});
    }
    long long calc = (ans[0]%mod) * (ans[1]%mod);
    calc %= mod;
    calc *= precarp;
    calc %= mod;
    int res = calc;
    return res;
}

int updateY(int pos, int val){
    int N = n;
    arr[pos][1] = val;
    long long vl = 1;
    int ind = 0;
    for(int i = N-1; i >= 0; i--){
        vl *= arr[i][0];
        if(vl > mod){
            ind = i;
            break;
        }
    }

    vl = 1;
    long long precarp = 1;
    for(int i = 0; i < ind; i++){
        precarp = (precarp * arr[i][0])%mod;
    }
    array<long long, 2> ans = {0LL, 0LL};
    for(int i = ind; i < N; i++){
        vl *= arr[i][0];
        ans = comp(ans, {vl, arr[i][1]});
    }
    long long calc = (ans[0]%mod) * (ans[1]%mod);
    calc %= mod;
    calc *= precarp;
    calc %= mod;
    int res = calc;
    return res;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:55:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   55 |     int res = calc;
      |               ^~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:86:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   86 |     int res = calc;
      |               ^~~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:117:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  117 |     int res = calc;
      |               ^~~~

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