0_0_20811329_32020.cpp: In function 'int main()':
0_0_20811329_32020.cpp:20:43: error: 'scanf_s' was not declared in this scope
while (scanf_s("%d%d%d%d", &n, &m, &k, &s) != EOF)
^
0_0_20811329_32020.cpp:22:25: error: 'memset' was not declared in this scope
memset(f, 0, sizeof(f));
^
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