제출 #1224427

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1224427		KALARRY	Inside information (BOI21_servers)	C++20	5 / 100	3612 ms	589824 KiB

servers

//chockolateman

#include<bits/stdc++.h>

using namespace std;

int N,K,counter[120005];
set<int> contain[120005];

int main()
{
    scanf("%d%d",&N,&K);
    for(int i = 1 ; i <= N ; i++)
    {
        counter[i] = 1;
        contain[i].insert(i);
    }
    for(int a,b,i = 1 ; i <= N + K - 1 ; i++)
    {
        char op;
        scanf(" %c",&op);
        scanf("%d",&a);
        if(op=='C')
            printf("%d\n",counter[a]);
        else if(op=='Q')
        {
            scanf("%d",&b);
            if(contain[a].count(b))
                printf("yes\n");
            else
                printf("no\n");
        }
        else
        {
            scanf("%d",&b);
            for(auto l : contain[a])
            {
                if(contain[b].count(l)==0)
                    counter[l]++;
                contain[b].insert(l);
            }
            for(auto l : contain[b])
            {
                if(contain[a].count(l)==0)
                    counter[l]++;
                contain[a].insert(l);
            }
        }

    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

servers.cpp: In function 'int main()':
servers.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     scanf("%d%d",&N,&K);
      |     ~~~~~^~~~~~~~~~~~~~
servers.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         scanf(" %c",&op);
      |         ~~~~~^~~~~~~~~~~
servers.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("%d",&a);
      |         ~~~~~^~~~~~~~~
servers.cpp:27:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |             scanf("%d",&b);
      |             ~~~~~^~~~~~~~~
servers.cpp:35:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |             scanf("%d",&b);
      |             ~~~~~^~~~~~~~~

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