Submission #1234265

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234265		badge881	Street Lamps (APIO19_street_lamps)	C++20	20 / 100	84 ms	5704 KiB

street_lamps

#include <bits/stdc++.h>

using namespace std;


int main()
{
    int n, q;
    scanf("%d%d\n", &n, &q);
    vector<int> count(n);
    vector<int> state(n);
    for (int i = 0; i < n; i++)
    {
        char chr;
        scanf("%c", &chr);
        count[i] = state[i] = (chr == '1');
    }
    vector<int> lastc(n, 0);
    for (int i = 0; i < q; i++)
    {
        char str[10];
        scanf("\n%s ", str);
        if (str[0] == 't')
        {
            int t;
            scanf("%d", &t);
            t--;
            if (state[t])
                count[t] += (i - lastc[t]);
            state[t] ^= 1;
            lastc[t] = i;
        }
        else
        {
            int l, r;
            scanf("%d%d", &l, &r);
            assert(l == r - 1);
            l--;
            int ans = count[l];
            if (state[l])
                ans += (i - lastc[l]);
            printf("%d\n", ans);
        }
    }
    return 0;
}

Compilation message (stderr)

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d%d\n", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
street_lamps.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf("%c", &chr);
      |         ~~~~~^~~~~~~~~~~~
street_lamps.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("\n%s ", str);
      |         ~~~~~^~~~~~~~~~~~~~
street_lamps.cpp:26:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |             scanf("%d", &t);
      |             ~~~~~^~~~~~~~~~
street_lamps.cpp:36:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |             scanf("%d%d", &l, &r);
      |             ~~~~~^~~~~~~~~~~~~~~~

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