Submission #563493

#	Time	Username	Problem	Language	Result	Execution time	Memory
563493		shahriarkhan	Carnival (CEOI14_carnival)	C++14	100 / 100	20 ms	312 KiB

carnival

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

const int MX = 155 ;

int col[MX] , vis[MX] , cnt[MX] , cur ;

vector<int> adj[MX] ;

int query(int l , int r)
{
    printf("%d ",r-l+1) ;
    for(int i = l ; i <= r ; ++i)
    {
        printf("%d ",i) ;
    }
    printf("\n") ;
    fflush(stdout) ;
    int ret ;
    scanf("%d",&ret) ;
    return ret ;
}

void dfs(int s)
{
    if(vis[s]) return ;
    vis[s] = 1 , col[s] = cur ;
    for(int t : adj[s])
    {
        dfs(t) ;
    }
}

int main()
{
    int n ;
    scanf("%d",&n) ;
    for(int i = 1 ; i <= n ; ++i)
    {
        cnt[i] = query(1,i) ;
        if(cnt[i]!=cnt[i-1]) continue ;
        int low = 1 , high = i - 1 ;
        while(low<high)
        {
            int mid = (low+high+1)>>1 ;
            if(query(mid,i)==query(mid,i-1)) low = mid ;
            else high = mid - 1 ;
        }
        adj[low].push_back(i) ;
    }
    for(int i = 1 ; i <= n ; ++i)
    {
        if(!vis[i])
        {
            ++cur ;
            dfs(i) ;
        }
    }
    printf("0 ") ;
    for(int i = 1 ; i <= n ; ++i)
    {
        printf("%d ",col[i]) ;
    }
    printf("\n") ;
    fflush(stdout) ;
    return 0 ;
}

Compilation message (stderr)

carnival.cpp: In function 'int query(int, int)':
carnival.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d",&ret) ;
      |     ~~~~~^~~~~~~~~~~
carnival.cpp: In function 'int main()':
carnival.cpp:37:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     scanf("%d",&n) ;
      |     ~~~~~^~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20