Submission #941444

#	Time	Username	Problem	Language	Result	Execution time	Memory
941444		Programmer123	Rectangles (IOI19_rect)	C++17	0 / 100	1 ms	348 KiB

rect

#include "rect.h"

long long count_rectangles(std::vector<std::vector<int> > a) {
    int N = a.size();
    int M = a[0].size();
    long long ans = 0;
    if (N == 3) {
        bool works[N];
        works[0] = false;
        works[N - 1] = false;
        for (int i = 1; i < N - 1; ++i) {
            works[i] = a[1][i] < a[0][i] && a[1][i] < a[2][i];
        }
        for (int l = 1; l < N - 1; ++l) {
            if (!works[l]) continue;
            int max = a[1][l];
            for (int r = l; r < N - 1; ++r) {
                if (!works[r]) break;
                max = std::max(max, a[1][r]);
                if (max >= a[1][l - 1]) break;
                if (max >= a[1][r + 1]) continue;
                ans++;
            }
        }
    }
    return ans;
}

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:5:9: warning: unused variable 'M' [-Wunused-variable]
    5 |     int M = a[0].size();
      |         ^

• Subtask 1: 0 / 8
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 22
• Subtask 5: 0 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28