Submission #1224350

#	Time	Username	Problem	Language	Result	Execution time	Memory
1224350		Jer	Inside information (BOI21_servers)	C++20	2 / 100	3586 ms	377728 KiB

servers

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 4005;
int n, k;

set<int> d[MAXN];

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

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

    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])
                {d[b].insert(i);}
                
            for (auto i : d[b])
                {d[a].insert(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);
            int res = 0;
            for (int i = 1; i <= n; i++) res += (d[i].find(c) != d[i].end());
            printf("%d\n", res);
        }
    }

    return 0;
}

Compilation message (stderr)

servers.cpp: In function 'int main()':
servers.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
servers.cpp:20:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         scanf(" %c", &t);
      |         ~~~~~^~~~~~~~~~~
servers.cpp:24:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |             scanf("%d%d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~
servers.cpp:34:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |             scanf("%d%d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~
servers.cpp:40:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |             scanf("%d", &c);
      |             ~~~~~^~~~~~~~~~

• Subtask 1-1: 2 / 2
• Subtask 1-2: 0 / 3
• Subtask 2-1: 0 / 2
• Subtask 2-2: 0 / 3
• Subtask 3-1: 0 / 5
• Subtask 3-2: 0 / 5
• Subtask 4-1: 0 / 10
• Subtask 4-2: 0 / 10
• Subtask 5-1: 0 / 12
• Subtask 5-2: 0 / 13
• Subtask 6-1: 0 / 17
• Subtask 6-2: 0 / 18