Submission #658939

#	Time	Username	Problem	Language	Result	Execution time	Memory
658939		Jeff12345121	Horses (IOI15_horses)	C++14	34 / 100	22 ms	12304 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"

#define REP(i,n) for(int i = 1; i <= (n); i++)
using namespace std;

#ifdef LOCAL
ifstream in("in.in");
ofstream out("out.out");
#endif

const int nmax = 1005;
long long n,x[nmax],y[nmax],inf = (1LL << 60),MOD = 1000000007;
double logx[nmax],logy[nmax];

int compute() {
    double horses_log = 0,max_sol_log = -inf;
    long long horses_mod = 1, max_sol_mod = -inf;
    
    for (int i = 0; i < n; i++) {
        horses_log = horses_log + logx[i];
        horses_mod = horses_mod * x[i] % MOD;

        if (horses_log + logy[i] > max_sol_log) {
            max_sol_log = horses_log + logy[i];
            max_sol_mod = horses_mod * y[i] % MOD;            
        }
    }

    return  max_sol_mod % MOD;
}
int init(int tn, int* tx,int* ty) {
    n = tn;
    for (int i = 0; i < n; i++) {
        x[i] = tx[i];
        logx[i] = log(x[i]);
        y[i] = ty[i];
        logy[i] = log(ty[i]);
    }

    return compute();
}
int updateX(int pos, int val) {
    x[pos] = val;
    logx[pos] = log(x[pos]);
    return compute();
}

int updateY(int pos, int val) {
    y[pos] = val;
    logy[pos] = log(y[pos]);
    return compute();
}

#ifdef LOCAL
int tx[nmax],ty[nmax];
int32_t main() {
    in >> n;
    for (int i = 0; i < n; i++) {
        in >> tx[i];
    }
    for (int i = 0; i < n; i++) {
        in >> ty[i];
    }

    out << init(n,tx,ty) << "\n";
    int m;
    in >> m;
    for (int i = 0; i < m; i++) {
        int type,pos,val;
        in >> type >> pos >> val;
        if (type == 0) {
            out << updateX(pos, val);
        }
        if (type == 1) {
            out << updateY(pos,val);
        }
    }
}
#endif

Compilation message (stderr)

horses.cpp: In function 'int compute()':
horses.cpp:17:41: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
   17 |     double horses_log = 0,max_sol_log = -inf;
      |                                         ^~~~
horses.cpp:30:25: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   30 |     return  max_sol_mod % MOD;
      |             ~~~~~~~~~~~~^~~~~

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