Compilare: user.cpp: In function ‘int main()’: user.cpp:36:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lacusta.in","r",stdin); ^ user.cpp:37:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lacusta.out","w",stdout); ^ user.cpp:39:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:43:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&mat[i][j]); ^ user.cpp: In function ‘int mn(int)’: user.cpp:32:12: warning: ‘jmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] return jmin; ^ user.cpp: In function ‘int main()’: user.cpp:54:68: warning: ‘jmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[i][j] = mat[i][j] + mat[i-1][j] + min(i-1, 2, x); ^