제출 #1224323

#제출 시각아이디문제언어결과실행 시간메모리
1224323lkaterisInside information (BOI21_servers)C++20
5 / 100
1695 ms16576 KiB
#include <iostream> using namespace std; bool M[4005][4005]; int main() { int N,K; scanf("%d%d",&N,&K); for(int i=1;i<=N;++i) M[i][i] = true; for(int q=1;q<=N+K-1;++q) { char t; scanf("\n%c",&t); if (t == 'S') { int a,b; scanf("%d%d",&a,&b); for(int i=1;i<=N;++i) { if (M[a][i] == true) M[b][i] = true; if (M[b][i] == true) M[a][i] = true; } } else if (t == 'Q') { int a,d; scanf("%d%d",&a,&d); if (M[a][d]) printf("yes\n"); else printf("no\n"); } else if (t == 'C') { int d; scanf("%d",&d); int res=0; for(int i=1;i<=N;++i) { if (M[i][d]) res++; } printf("%d\n",res); } } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

servers.cpp: In function 'int main()':
servers.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d%d",&N,&K);
      |     ~~~~~^~~~~~~~~~~~~~
servers.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         scanf("\n%c",&t);
      |         ~~~~~^~~~~~~~~~~
servers.cpp:19:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |             scanf("%d%d",&a,&b);
      |             ~~~~~^~~~~~~~~~~~~~
servers.cpp:27:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |             scanf("%d%d",&a,&d);
      |             ~~~~~^~~~~~~~~~~~~~
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);
      |             ~~~~~^~~~~~~~~
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