This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#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;
| ^~~~
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