Submission #1030262

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030262		vjudge1	Koala Game (APIO17_koala)	C++17	33 / 100	54 ms	596 KiB

koala

#include "koala.h"
#include<bits/stdc++.h>
using namespace std;
mt19937 rng(243987);
int minValue(int N, int W) {
    int me[100]{1},you[100];
    playRound(me,you);
    for(int i=0;i<N;i++)
        if(you[i]==0)
            return i;
    return 0;
}

int maxValue(int N, int W) {
    int me[100],you[100];
    vector<int>theposs(N);
    iota(theposs.begin(),theposs.end(),0);
    while(theposs.size()>1){
        memset(me,0,sizeof me);
        for(auto i:theposs)
            me[i]=W/theposs.size();
        playRound(me,you);
        vector<int>theposs2;
        for(auto i:theposs)
            if(you[i])theposs2.push_back(i);
        theposs=theposs2;
    }
    return theposs[0];
}
int maxValue2(set<int>theposs, int W) {
    int me[100],you[100], ORIG=theposs.size();
    while(theposs.size()>1){
        memset(me,0,sizeof me);
        for(auto i:theposs)
            me[i]=(W+theposs.size()-ORIG)/theposs.size();
        playRound(me,you);
        set<int>theposs2;
        for(auto i:theposs)
            if(you[i])theposs2.insert(i);
        theposs=theposs2;
    }
    return *theposs.begin();
}

int greaterValue(int N, int W) {
    int me[100]{1,1},you[100];
    int L=1,R=min(W/2,8);
    while(L<=R){
        int mid=L+R>>1;
        me[0]=mid;
        me[1]=mid;
        playRound(me,you);
        if(you[0]-you[1])
            return !you[0];
        if(you[0])
            L=mid+1;
        else R=mid-1;
    }
}
int lst[101];
int greaterValue2(int A,int B) {
    if(lst[A]-lst[B])
        return lst[A]<lst[B];
    int me[100]{},you[100];
    me[A]=lst[A],me[B]=lst[B];
    playRound(me,you);
    return !you[A];
}
vector<int>mergesort(vector<int>a){
    if(a.size()==1) return a;
    vector<int>a2,b2;
    shuffle(a.begin(),a.end(),rng);
    for(int i=0;i<a.size()/2;i++)
        a2.push_back(a[i]);
    for(int i=a.size()/2;i<a.size();i++)
        b2.push_back(a[i]);
    a2=mergesort(a2);
    b2=mergesort(b2);
    vector<int>finals;
    int l=0,r=0;
    while(l<a2.size()&&r<b2.size()){
        if(greaterValue2(a2[l],b2[r])) {
            finals.push_back(b2[r++]);
        } else {
            finals.push_back(a2[l++]);
        }
    }
    while(l<a2.size())
        finals.push_back(a2[l++]);
    while(r<b2.size())
        finals.push_back(b2[r++]);
    return finals;
}
void allValues(int N, int W, int *P) {
    for(int i=0;i<N;i++){
        int l=1,r=8;
        while(l<=r){
            int mid=l+r>>1;
            int me[100]{},you[100];
            me[i]=mid;
            playRound(me,you);
            if(you[i])
                lst[i]=mid,l=mid+1;
            else r=mid-1;
        }
    }
    vector<int>v(N);
    iota(v.begin(),v.end(),0);
    stable_sort(v.begin(),v.end(),[](int a,int b){
        return greaterValue2(a,b);
    });
    for(int i=0;i<N;i++)
        P[v[i]]=N-i;
}

Compilation message (stderr)

koala.cpp: In function 'int greaterValue(int, int)':
koala.cpp:49:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   49 |         int mid=L+R>>1;
      |                 ~^~
koala.cpp: In function 'std::vector<int> mergesort(std::vector<int>)':
koala.cpp:73:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |     for(int i=0;i<a.size()/2;i++)
      |                 ~^~~~~~~~~~~
koala.cpp:75:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |     for(int i=a.size()/2;i<a.size();i++)
      |                          ~^~~~~~~~~
koala.cpp:81:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     while(l<a2.size()&&r<b2.size()){
      |           ~^~~~~~~~~~
koala.cpp:81:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     while(l<a2.size()&&r<b2.size()){
      |                        ~^~~~~~~~~~
koala.cpp:88:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     while(l<a2.size())
      |           ~^~~~~~~~~~
koala.cpp:90:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |     while(r<b2.size())
      |           ~^~~~~~~~~~
koala.cpp: In function 'void allValues(int, int, int*)':
koala.cpp:98:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   98 |             int mid=l+r>>1;
      |                     ~^~
koala.cpp: In function 'int greaterValue(int, int)':
koala.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type]
   59 | }
      | ^

• Subtask 1: 4 / 4
• Subtask 2: 15 / 15
• Subtask 3: 14 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 53