제출 #1224356

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1224356		Jer	Inside information (BOI21_servers)	C++20	5 / 100	1539 ms	377116 KiB

servers

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 4005;
int n, k;

set<int> d[MAXN];
int cnt[MAXN];

int main(){
    scanf("%d%d", &n, &k);

    for (int i = 1; i <= n; i++)
        d[i].insert(i), cnt[i] = 1;

    char t;
    int a, b, c;
    for (int z = 0; z < n + k - 1; z++)
    {
        scanf(" %c", &t);

        if (t == 'S')
        {
            scanf("%d%d", &a, &b);
            for (auto i : d[a])
                if (d[b].find(i) == d[b].end())
                    d[b].insert(i), cnt[i]++;
                
            for (auto i : d[b])
                if (d[a].find(i) == d[a].end())
                    d[a].insert(i), cnt[i]++;
        }

        if (t == 'Q')
        {
            scanf("%d%d", &a, &b);
            printf("%s\n", (d[a].find(b) != d[a].end()) ? "yes" : "no");
        }

        if (t == 'C')
        {
            scanf("%d", &c);
            printf("%d\n", cnt[c]);
        }
    }

    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", &t);
      |         ~~~~~^~~~~~~~~~~
servers.cpp:25:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |             scanf("%d%d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~
servers.cpp:37:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |             scanf("%d%d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~
servers.cpp:43:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |             scanf("%d", &c);
      |             ~~~~~^~~~~~~~~~

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