제출 #108373

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
108373		RezwanArefin01	코알라 (APIO17_koala)	C++17	87 / 100	87 ms	512 KiB

koala

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

int B[100], R[100], N, W;  

int minValue(int N, int W) {
    B[0] = 1; 
    playRound(B, R); 
    for(int i = 0; i < N; ++i) 
        if(!R[i]) return i; 
    return -1; 
}

int maxValue(int N, int W) {
    vector<int> L; 
    for(int i = 0; i < N; ++i)
        L.push_back(i); 
    while(L.size() > 1) {
        int t = W / L.size(); 
        for(int i = 0; i < N; ++i) 
            B[i] = R[i] = 0; 
        for(int i : L) B[i] = t; 
        playRound(B, R); 
        L.clear(); 
        for(int i = 0; i < N; ++i) {
            if(R[i] > t) {
                L.push_back(i); 
            }
        }
    }
    return L[0];
}

bool compare(int i, int j) {
    int p[] = {1, 3, 6, 8}; 
    int lo = 0, hi = 3; 
    for(int i = 0; i < N; ++i) B[i] = 0;  
    while(lo <= hi) {
        int mid = lo + hi >> 1; 
        if(p[mid] * 2 > W) {
            hi = mid - 1; 
            continue; 
        }
        B[i] = B[j] = p[mid]; 
        playRound(B, R); 
        bool z = R[i] > B[i]; 
        bool o = R[j] > B[j]; 
        if(z == o) {
            if(z) lo = mid + 1; 
            else hi = mid - 1; 
        } else {
            return z ? 0 : 1; 
        }
    }  
}

int greaterValue(int _N, int _W) {
    N = _N; W = _W;
    return compare(0, 1); 
}

int Q[100]; 

void sort(vector<int> &a) {
	if(a.size() <= 1) return;
	vector<int> l, r; 
	int n = a.size(), k = n / 2; 
	for(int i = 0; i < k; i++) l.push_back(a[i]); 
	for(int i = k; i < n; i++) r.push_back(a[i]); 
	sort(l); sort(r); a.clear(); 
	merge(l.begin(), l.end(), r.begin(), r.end(), back_inserter(a), compare);
}
void sort(vector<int> &a, int l, int r) {
    if(l == r) {
        Q[l] = a[0]; 
        return; 
    }
    int t = W / a.size(); 
    memset(B, 0, sizeof B); 
    for(int i : a) B[i] = t; 
    playRound(B, R); 

    vector<int> big, small; 
    for(int i : a) {
        if(R[i] > t) big.push_back(i); 
        else small.push_back(i); 
    }
    if(big == a || small == a) {
    	sort(a);
        for(int i = l; i <= r; i++) {
            Q[i] = a[i - l]; 
        }
        return; 
    }
    sort(small, l, l + small.size() - 1); 
    sort(big, r - big.size() + 1, r); 
}

void allValues(int _N, int _W, int *P) {
    N = _N, W = _W; 
    vector<int> v; 
    for(int i = 0; i < N; ++i) 
        v.push_back(i); 
    sort(v, 0, N - 1); 
    for(int i = 0; i < N; ++i) 
        P[Q[i]] = i + 1; 
}

컴파일 시 표준 에러 (stderr) 메시지

koala.cpp: In function 'bool compare(int, int)':
koala.cpp:40:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = lo + hi >> 1; 
                   ~~~^~~~
koala.cpp:56:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 4 / 4
• Subtask 2: 15 / 15
• Subtask 3: 18 / 18
• Subtask 4: 10 / 10
• Subtask 5: 40 / 53