Compilare: user.cpp: In function ‘int main()’: user.cpp:91:13: warning: unused variable ‘wHere’ [-Wunused-variable] int wHere = j - 1 - stk[(int)stk.size() - 2].second; ^ user.cpp:104:11: warning: unused variable ‘wHere’ [-Wunused-variable] int wHere = 2 * m - 2 - stk[(int)stk.size() - 2].second; ^ user.cpp:22:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:25:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^