Compilare: user.cpp: In function ‘int main()’: user.cpp:56:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((a[n - i][n - j + 1] - a[n - i - 1][n - j + 1] < st && a[i + 1][j] == a[i + 1][j + 1]) || a[i + 1][j+1] > a[i + 1][j]) ^ user.cpp:72:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }while (a[i + 1][j + 1] < a[i + 1][j] || j < a[i+1][0]); ^ user.cpp:63:9: warning: unused variable ‘semafor’ [-Wunused-variable] bool semafor = false; ^