Submission

Score: 70

User: purihorharin

Problemset: เปิดไฟ

Language: cpp

Time: 1.096 second

Submitted On: 2026-03-19 23:17:57

#include <iostream>
#include <bitset>

std::bitset<100000> light;

int main () {
    std::cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);

    int n, m;
    std::cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int o, s, e;
        std::cin >> o >> s >> e;
        if (o == 0) {
            for (int j = s - 1; j < e; j++) {
                light[j] = !light[j];
            }
        } else {
            int count = 0;
            for (int j = s - 1; j < e; j++) {
                count += light[j];
            }
            std::cout << count << "\n";
        }
    }
}