Compilare: main.cpp: In function 'int main()': main.cpp:15:21: warning: unused variable 'a' [-Wunused-variable] 15 | int n, i, k, j, a, b, cnt = 0; | ^ main.cpp:15:24: warning: unused variable 'b' [-Wunused-variable] 15 | int n, i, k, j, a, b, cnt = 0; | ^ main.cpp:30:23: warning: 'poz2' may be used uninitialized in this function [-Wmaybe-uninitialized] 30 | int poz1, poz2, minn = 3 * n; | ^~~~ main.cpp:41:26: warning: 'poz1' may be used uninitialized in this function [-Wmaybe-uninitialized] 41 | mat[poz1][0] = 1; | ~~~~~~~~~~~~~^~~