제출 #834022

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
834022		TB_	말 (IOI15_horses)	C++17	17 / 100	506 ms	98740 KiB

horses

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define INF (ll)1e9+7
#define fo(i, x) for(ll i = 0; i<x;i++)
#define pb push_back
#define deb(x) cout << #x << " = " << x << endl;
#define deb2(x, y) cout << #x << " = " << x << ", "  << #y << " = " << y << endl;

typedef vector<ll> vl;


vl x, y;
vector<long double> prefLog;

struct Node{
	Node *lnode, *rnode;
	int l, r;
	long double valLog = 0, addLog = 0;

	Node(int l, int r) : l(l), r(r){
		if(r-l == 1) {
			valLog = prefLog[l];
		}else{
			int mid = (r+l)/2;
			lnode = new Node(l, mid);
			rnode = new Node(mid, r);
			valLog = max(lnode->valLog, rnode->valLog);
		}
	}

	void update(int lo, int hi, long double upVal){
		if(r <= lo || hi <= l) return;
		if(r <= hi && lo <= l){
			addLog += upVal;
			valLog += upVal;
			return;
		}
		push();
		lnode->update(lo, hi, upVal);
		rnode->update(lo, hi, upVal);
		valLog = max(lnode->valLog, rnode->valLog);
	}

	long double query(){
		if(r-l == 1) return valLog;
		push();
		if(lnode->valLog >rnode->valLog) return lnode->query();
		else return rnode->query();
	}

	void push(){
		lnode->addLog += addLog;
		lnode->valLog += addLog;
		rnode->addLog += addLog;
		rnode->valLog += addLog;
		addLog = 0;
	}
};

Node *st;
vector<long double> logVals = {log10l(INF)};

long double binPow(long double currentVal){
	long double lo = 0;
	long double hi = INF+10;
	fo(i, 50){
		long double mid = (lo+hi) / 2;
		if(log10l(mid)>=currentVal) hi = mid;
		else lo = mid;
	}
	return hi;
}

ll solve(long double currentVal){
	for(int i = 22; i >= 0; i--) if(currentVal >= logVals[i]) currentVal-=logVals[i];
	return round(binPow(currentVal));
}

int init(int N, int X[], int Y[]) {
	fo(i, N){
		x.pb(X[i]);
		y.pb(Y[i]);
	}
	ll current = 1;
	long double currentLog = 0;
	int n = x.size();
	fo(i, n){
		currentLog += log10l(x[i]);
		prefLog.pb(currentLog+log10l(y[i]));
	}
	st = new Node(0, N);
	fo(i, 23) logVals.pb(logVals[i]*((long double)2));
	
	return solve(st->query());
}

long double customLog(ll lval){
	return (lval<0?-log10l(lval):log10l(lval));
}

int updateX(int pos, int val) {	
	long double delta = customLog(val)-customLog(y[pos]);
	x[pos] = val;
	st->update(pos, x.size(), delta);
	return solve(st->query());
}

int updateY(int pos, int val) {
	long double delta = customLog(val)-customLog(y[pos]);
	y[pos] = val;
	st->update(pos, pos+1, delta);
	return solve(st->query());
}


// static char _buffer[1024];
// static int _currentChar = 0;
// static int _charsNumber = 0;
// static FILE *_inputFile, *_outputFile;

// static inline int _read() {
//     if (_charsNumber < 0) {
//         exit(1);
//     }
//     if (!_charsNumber || _currentChar == _charsNumber) {
//         _charsNumber = (int)fread(_buffer, sizeof(_buffer[0]), sizeof(_buffer), _inputFile);
//         _currentChar = 0;
//     }
//     if (_charsNumber <= 0) {
//         return -1;
//     }
//     return _buffer[_currentChar++];
// }

// static inline int _readInt() {
//     int c, x, s;
//     c = _read();
//     while (c <= 32) c = _read();
//     x = 0;
//     s = 1;
//     if (c == '-') {
//         s = -1;
//         c = _read();
//     }
//     while (c > 32) {
//         x *= 10;
//         x += c - '0';
//         c = _read();
//     }
//     if (s < 0) x = -x;
//     return x;
// }


// int main() {
// 	_inputFile = fopen("horses.in", "rb");
// 	_outputFile = fopen("horses.out", "w");
	
// 	int N; N = _readInt();

// 	int *X = (int*)malloc(sizeof(int)*(unsigned int)N);
// 	int *Y = (int*)malloc(sizeof(int)*(unsigned int)N);

// 	for (int i = 0; i < N; i++) {
// 		X[i] = _readInt();
// 	}

// 	for (int i = 0; i < N; i++) {
// 		Y[i] = _readInt();
// 	}	

// 	fprintf(_outputFile,"%d\n",init(N,X,Y));

// 	int M; M = _readInt();

// 	for (int i = 0; i < M; i++) {
// 		int type; type = _readInt();
// 		int pos; pos = _readInt();
// 		int val; val = _readInt(); 

// 		if (type == 1) {
// 			fprintf(_outputFile,"%d\n",updateX(pos,val));
// 		} else if (type == 2) {
// 			fprintf(_outputFile,"%d\n",updateY(pos,val));
// 		}
// 	}

// 	return 0;
// }

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In constructor 'Node::Node(int, int)':
horses.cpp:22:18: warning: declaration of 'r' shadows a member of 'Node' [-Wshadow]
   22 |  Node(int l, int r) : l(l), r(r){
      |              ~~~~^
horses.cpp:19:9: note: shadowed declaration is here
   19 |  int l, r;
      |         ^
horses.cpp:22:11: warning: declaration of 'l' shadows a member of 'Node' [-Wshadow]
   22 |  Node(int l, int r) : l(l), r(r){
      |       ~~~~^
horses.cpp:19:6: note: shadowed declaration is here
   19 |  int l, r;
      |      ^
horses.cpp: In constructor 'Node::Node(int, int)':
horses.cpp:22:18: warning: declaration of 'r' shadows a member of 'Node' [-Wshadow]
   22 |  Node(int l, int r) : l(l), r(r){
      |              ~~~~^
horses.cpp:19:9: note: shadowed declaration is here
   19 |  int l, r;
      |         ^
horses.cpp:22:11: warning: declaration of 'l' shadows a member of 'Node' [-Wshadow]
   22 |  Node(int l, int r) : l(l), r(r){
      |       ~~~~^
horses.cpp:19:6: note: shadowed declaration is here
   19 |  int l, r;
      |      ^
horses.cpp: In constructor 'Node::Node(int, int)':
horses.cpp:22:18: warning: declaration of 'r' shadows a member of 'Node' [-Wshadow]
   22 |  Node(int l, int r) : l(l), r(r){
      |              ~~~~^
horses.cpp:19:9: note: shadowed declaration is here
   19 |  int l, r;
      |         ^
horses.cpp:22:11: warning: declaration of 'l' shadows a member of 'Node' [-Wshadow]
   22 |  Node(int l, int r) : l(l), r(r){
      |       ~~~~^
horses.cpp:19:6: note: shadowed declaration is here
   19 |  int l, r;
      |      ^
horses.cpp: In function 'long long int solve(long double)':
horses.cpp:78:14: warning: conversion from 'long double' to 'long long int' may change value [-Wfloat-conversion]
   78 |  return round(binPow(currentVal));
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:88:16: warning: conversion from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   88 |  int n = x.size();
      |          ~~~~~~^~
horses.cpp:96:14: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   96 |  return solve(st->query());
      |         ~~~~~^~~~~~~~~~~~~
horses.cpp:86:5: warning: unused variable 'current' [-Wunused-variable]
   86 |  ll current = 1;
      |     ^~~~~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:106:24: warning: conversion from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
  106 |  st->update(pos, x.size(), delta);
      |                  ~~~~~~^~
horses.cpp:107:14: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  107 |  return solve(st->query());
      |         ~~~~~^~~~~~~~~~~~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:114:14: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  114 |  return solve(st->query());
      |         ~~~~~^~~~~~~~~~~~~

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