Submission #160265

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
160265	2019-10-26 15:32:53	bortoz	Horses (IOI15_horses)	C++17	100 / 100	383 ms	31864 KiB

horses

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#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
constexpr int MAXN = 1 << 19;
constexpr int MOD = 1e9 + 7;
pair<int, bool> segX[2 * MAXN];
int segM[2 * MAXN];
int Y[MAXN];
pair<int, bool> joinX(pair<int, bool>& a, pair<int, bool>& b) {
  ll r = 1ll * a.fi * b.fi;
  bool o = (r >= MOD) || a.se || b.se;
  return make_pair(r % MOD, o);
}
pair<int, bool> queryX(int l, int r) {
  pair<int, bool> ans{1, false};
  for (l += MAXN, r += MAXN; l < r; l /= 2, r /= 2) {
    if (l & 1) ans = joinX(ans, segX[l++]);
    if (r & 1) ans = joinX(ans, segX[--r]);
  }
  return ans;
}
int joinM(int a, int b) {
 
 
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Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:46:54: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return 1ll * queryX(0, segM[1] + 1).fi * Y[segM[1]] % MOD;
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:54:54: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return 1ll * queryX(0, segM[1] + 1).fi * Y[segM[1]] % MOD;
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:62:54: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return 1ll * queryX(0, segM[1] + 1).fi * Y[segM[1]] % MOD;
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~

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