Compilare: main.cpp: In function 'int main()': main.cpp:27:34: warning: array subscript has type 'char' [-Wchar-subscripts] for (i = 1; i <= l && c[sx[i]][sy[i]] <= z; i++) ^ main.cpp:29:25: warning: array subscript has type 'char' [-Wchar-subscripts] if ((c[sx[i]][sy[i]] + 1 < c[sx[i] + k][sy[i] + k * (k - 1) / 2]) || ^ main.cpp:34:24: warning: array subscript has type 'char' [-Wchar-subscripts] c[sx[l]][sy[l]] = c[sx[i]][sy[i]] + 1; ^ main.cpp:34:42: warning: array subscript has type 'char' [-Wchar-subscripts] c[sx[l]][sy[l]] = c[sx[i]][sy[i]] + 1; ^ main.cpp:35:27: warning: array subscript has type 'char' [-Wchar-subscripts] from[sx[l]][sy[l]] = k; ^ main.cpp:15:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zile.in", "r", stdin); ^ main.cpp:16:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zile.out", "w", stdout); ^ main.cpp:18:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d ", &n, &z, &m); ^