Compilare: main.cpp: In function 'int main()': main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 0; i < n; ++i){ | ~~^~~ main.cpp:41:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(int i = 1; i <= m; ++i){ | ~~^~~~ main.cpp:42:26: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int j = 0; j < n; ++j){ | ~~^~~ main.cpp:22:9: warning: unused variable 'mul' [-Wunused-variable] 22 | int mul = 1; | ^~~ main.cpp:23:9: warning: unused variable 'c' [-Wunused-variable] 23 | int c = 0; | ^