제출 #672338

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
672338		Trisanu_Das	Horses (IOI15_horses)	C++17	컴파일 에러	0 ms	0 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define mod 1000000007
using namespace std;
typedef long long ll;
 
int n;
 
struct node{
  ll v, x, y; double dx, dy, dv;
}t[4 * 500005];
 
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(int i, int l, int r, int ps, ll vx, ll vy){
  if (l > ps || r < ps) return t[x];
  if (l == r && l == ps) {
		node& nd = t[x];
		if (vx) nd.dx = log(vx), nd.x = vx;
		if (vy) nd.dy = log(vy), nd.y = vy;
		nd.v = nd.x * nd.y % mod, nd.dv = nd.dx + nd.dy;
		return nd;
	}
	int m = (l + r) / 2;
	return t[i] = merge(upd(i * 2, l, mid, ps, vx, vy), upd(i * 2 + 1, mid + 1, r, ps, vx, vy));
}
 
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;
}

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'node upd(int, int, int, int, ll, ll)':
horses.cpp:25:34: error: 'x' was not declared in this scope
   25 |   if (l > ps || r < ps) return t[x];
      |                                  ^
horses.cpp:27:16: error: 'x' was not declared in this scope
   27 |   node& nd = t[x];
      |                ^
horses.cpp:34:36: error: 'mid' was not declared in this scope; did you mean 'mod'?
   34 |  return t[i] = merge(upd(i * 2, l, mid, ps, vx, vy), upd(i * 2 + 1, mid + 1, r, ps, vx, vy));
      |                                    ^~~
      |                                    mod
horses.cpp:33:6: warning: unused variable 'm' [-Wunused-variable]
   33 |  int m = (l + r) / 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;
      |         ~~~~~^