Submission #941481

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
941481	2024-03-09 02:00:41	Programmer123	Rectangles (IOI19_rect)	C++17	50 / 100	5027 ms	86284 KiB

rect

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#ifndef LOCAL
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2,sse4.2")
#endif
#include "rect.h"
long long count_rectangles(std::vector<std::vector<int> > a) {
    int N = a.size();
    int M = a[0].size();
    int maxv = 0;
    for (int i = 0; i < N; ++i) {
        for (int j = 0; j < M; ++j) {
            maxv = std::max(maxv, a[i][j]);
        }
    }
    if (maxv == 0) return 0;
    long long ans = 0;
    if (maxv == 1) {
        int pfx[N][M];
        pfx[0][0] = a[0][0];
        for (int i = 1; i < M; ++i) {
            pfx[0][i] = a[0][i] + pfx[0][i - 1];
        }
        for (int i = 1; i < N; ++i) {
            pfx[i][0] = a[i][0] + pfx[i - 1][0];
            for (int j = 1; j < M; ++j) {
                pfx[i][j] = a[i][j] + pfx[i - 1][j] + pfx[i][j - 1] - pfx[i - 1][j - 1];
            }
        }
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 13 / 13
• Subtask 7: 0 / 28