Submission #174643

#	Time	Username	Problem	Language	Result	Execution time	Memory
174643		mat_v	Horses (IOI15_horses)	C++14	17 / 100	1564 ms	19944 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"
#define mod 1000000007
#define maxn 500005
using namespace std;
typedef long long ll;
ll add(ll x, ll y){
    return (x + y)%mod;
}
bool preso = 0;
ll mul(ll x, ll y){
    if(x * y >= mod)preso = 1;
    return (x * y)%mod;
}
ll power(ll x, ll y){
    if(y == 0)return 1;
    ll pola = power(x, y / 2);
    pola = mul(pola, pola);
    if(y%2 == 1)pola = mul(pola, x);
    return pola;
}

int n;
ll x[maxn];
ll y[maxn];
double lgx[maxn];
double lgy[maxn];

int init(int N, int X[], int Y[]) {
	n = N;
    for(int i=1; i<=n; i++){
        x[i] = X[i - 1];
        y[i] = Y[i - 1];
        lgx[i] = log(1.0 * x[i]);
        lgy[i] = log(1.0 * y[i]);
    }
    double res = 0;
    int koji = 0;
    double p = 0;
    for(int i=1; i<=n; i++){
        p += lgx[i];
        if(p + lgy[i] > res){
            res = p + lgy[i];
            koji = i;
        }
    }
    ll kurac = 1;
    for(int i=1; i<=n; i++){
        kurac = mul(kurac, x[i]);
        if(i == koji){
            kurac = mul(kurac, y[i]);
            break;
        }
    }
	return kurac;
}

int updateX(int pos, int val) {
    x[pos + 1] = val;
    ll res = 0;
    ll p = 1;
    for(int i=1; i<=n; i++){
        p = mul(p, x[i]);
        res = max(res, mul(p, y[i]));
    }

	return res;
}

int updateY(int pos, int val) {
	y[pos + 1] = val;
    ll res = 0;
    ll p = 1;
    for(int i=1; i<=n; i++){
        p = mul(p, x[i]);
        res = max(res, mul(p, y[i]));
    }
    if(preso){
        for(int i=1; i<=1000000000; i++){
            for(int j=0; j>=-10000; j++)res +=x[j];
            res = add(res, 68);
            res = res & (i - 5);
            res %= 125123;
        }
    }
	return res;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:34:31: warning: conversion to 'double' from 'll {aka long long int}' may alter its value [-Wconversion]
         lgx[i] = log(1.0 * x[i]);
                            ~~~^
horses.cpp:35:31: warning: conversion to 'double' from 'll {aka long long int}' may alter its value [-Wconversion]
         lgy[i] = log(1.0 * y[i]);
                            ~~~^
horses.cpp:55:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return kurac;
         ^~~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:67:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return res;
         ^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:86:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return res;
         ^~~

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