Submission #408716

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
408716	2021-05-19T14:26:54 Z	ly20	Inside information (BOI21_servers)	C++17	Compilation error	0 ms	0 KB

servers

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 121234;
int v[MAXN];
int main() {
    int n, k;
    scanf("%d %d", &n, &k);
    k += n - 1;
    int id = 0;
    v[1] = 0;
    id++;
    for(int i = 0; i < k; i++) {
        char c;
        scanf(" %c", &c);
        if(c == 'S') {
            int a, b;
            scanf("%d %d", &a, &b);
            if(a != 1) swap(a, b);
            v[b] = id++;
        }
        else if(c == 'Q') {
            int a, b;
            scanf("%d %d", &a, &b);
            if(v[a] > v[b] || (a == 1 && id[b] != 0)) printf("yes\n");
            else printf("no\n");
        }
        else {
            int a;
            scanf("%d", &a);
            if(a != 1) printf("%d\n", id - v[a] + 1);
            else printf("%d\n", id - v[a]);
        }
    }
}

Compilation message

servers.cpp: In function 'int main()':
servers.cpp:24:44: error: invalid types 'int[int]' for array subscript
   24 |             if(v[a] > v[b] || (a == 1 && id[b] != 0)) printf("yes\n");
      |                                            ^
servers.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     scanf("%d %d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~
servers.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf(" %c", &c);
      |         ~~~~~^~~~~~~~~~~
servers.cpp:17:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |             scanf("%d %d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~~
servers.cpp:23:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |             scanf("%d %d", &a, &b);
      |             ~~~~~^~~~~~~~~~~~~~~~~
servers.cpp:29:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |             scanf("%d", &a);
      |             ~~~~~^~~~~~~~~~