Submission #982205

#TimeUsernameProblemLanguageResultExecution timeMemory
982205AmaarsaaHorses (IOI15_horses)C++14
100 / 100
412 ms67152 KiB
#include<bits/stdc++.h> #include "horses.h" using namespace std; using ll = long long; const ll mod = 1e9 + 7; struct node{ ll v, x, y; double dx, dy, dv; }t[4 * 500005]; ll n; node merge(node a, node b) { node res; b.dx += a.dx; b.dv += a.dx; if ( a.dv > b.dv) res.v = a.v, res.dv = a.dv; else res.v = (a.x * b.v)% mod, res.dv = b.dv; res.x = a.x * b.x % mod; res.dx = b.dx; return res; } node upd(ll p, ll lo, ll hi, ll ind, ll x, ll y) { if (lo > ind || ind > hi) return t[p]; if (lo == hi) { node& nd = t[p]; if ( x ) nd.dx = log(x), nd.x =x; if ( y ) nd.dy = log(y), nd.y =y; nd.v = (nd.x * nd.y) % mod; nd.dv = nd.dx + nd.dy; return nd; } int mid = (lo +hi)/2; return t[p] = merge(upd(2 * p, lo, mid, ind, x, y), upd(2 * p + 1, mid + 1, hi, ind, x, y)); } int init(int N, int X[], int Y[]) { n = N; for (int i = 0; i < N; i++) upd(1, 0, n - 1, i, X[i], Y[i]); return t[1].v; } int updateX(int pos, int val) { upd(1, 0, n - 1, pos, val, 0); return t[1].v; } int updateY(int pos, int val) { upd(1, 0, n - 1, pos, 0, val); return t[1].v; }

Compilation message (stderr)

horses.cpp: In function 'node upd(ll, ll, ll, ll, ll, ll)':
horses.cpp:33:20: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   33 |  int mid = (lo +hi)/2;
      |            ~~~~~~~~^~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:40:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   40 |  return t[1].v;
      |         ~~~~~^
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:45:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   45 |  return t[1].v;
      |         ~~~~~^
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:50:14: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   50 |  return t[1].v;
      |         ~~~~~^
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...