Submission #1206409

#	Time	Username	Problem	Language	Result	Execution time	Memory
1206409		pera	Horses (IOI15_horses)	C++20	34 / 100	1596 ms	12168 KiB

horses

#include<bits/stdc++.h>
#include "horses.h"
#define LL long long
using namespace std;
const int N_MAX = 5E5 + 1;
const LL mod = 1E9 + 7;
const __int128 oo = 1E9;
int n;
vector<LL> x(N_MAX) , y(N_MAX);
int calc(){
   int j = 0; 
   __int128 prd = 1;
   for(int i = n - 1;i >= 0;i --){
      j = i;
      if(__int128(x[i]) * prd > oo){
         break;
      }
      prd *= x[i];
   }
   prd = 1;
   __int128 best = 0;
   for(int i = j;i < n;i ++){
      prd *= __int128(x[i]);
      __int128 A = __int128(prd) * __int128(y[i]);
      best = max(best , A);
   }
   best %= mod;
   for(int i = 0;i < j;i ++){
      best = x[i] * best % mod;
   }
   best %= mod;
   return (int)best;
}

int init(int N, int X[], int Y[]) {
   n = N;
   for(int i = 0;i < N;i ++){
      x[i] = X[i];
      y[i] = Y[i];
   }
   return calc();
}

int updateX(int pos, int val) {	
   x[pos] = val;
	return calc();
}

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

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