Submission #1234246

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234246		badge881	Street Lamps (APIO19_street_lamps)	C++20	20 / 100	5095 ms	4424 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;

const int N = 1e3 + 11;

int n, q;
int a[N][N];

char chr;

int main()
{
    scanf("%d%d\n", &n, &q);
    for (int i = 1; i <= n; i++)
    {
        scanf("%c", &chr);
        a[i][0] = chr - '0';
    }
    for (int t = 1; t <= q; t++)
    {
        char str[10];
        scanf("\n%s ", str);
        for (int i = 1; i <= n; i++)
            a[i][t] = a[i][t - 1];
        if (str[0] == 't') // supposing there is no output starting by t other than toggle
        {
            int p;
            scanf("%d\n", &p);
            a[p][t] ^= 1;
        }
        else
        {
            int l, r, ans = 0;
            scanf("%d%d\n", &l, &r);
            for (int i = 0; i < t; i++)
            {
                bool ok = 1;
                for (int j = l; j < r; j++)
                    ok &= a[j][i];
                ans += ok;
            }
            printf("%d\n", ans);
        }
    }
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%d%d\n", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
street_lamps.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         scanf("%c", &chr);
      |         ~~~~~^~~~~~~~~~~~
street_lamps.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("\n%s ", str);
      |         ~~~~~^~~~~~~~~~~~~~
street_lamps.cpp:29:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |             scanf("%d\n", &p);
      |             ~~~~~^~~~~~~~~~~~
street_lamps.cpp:35:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |             scanf("%d%d\n", &l, &r);
      |             ~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20