Compilare: main.cpp: In function 'int main()': main.cpp:68:26: warning: left operand of comma operator has no effect [-Wunused-value] l1 , l2; ^~ main.cpp:68:28: warning: right operand of comma operator has no effect [-Wunused-value] l1 , l2; ^ main.cpp: In function 'void solve(int**)': main.cpp:19:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d%d" , &type , &l , &r , &k); ^ main.cpp: In function 'int main()': main.cpp:35:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("aparate.in" , "r" , stdin); ^ main.cpp:36:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("aparate.out" , "w" , stdout); ^ main.cpp:37:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d" , &n , &m , &q); ^ main.cpp:47:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d" , &v [i][j]); ^ main.cpp:54:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d" , &v [i][j]); ^ main.cpp:59:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d%d" , &type , &l , &r , &k); ^