Compilare: main.cpp: In function 'int main()': main.cpp:20:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i=0; i<a.size(); i++){ e=(e*10+a[i])%100,000,007;szor=szor*10;} | ~^~~~~~~~~ main.cpp:20:55: warning: right operand of comma operator has no effect [-Wunused-value] 20 | for (int i=0; i<a.size(); i++){ e=(e*10+a[i])%100,000,007;szor=szor*10;} | ^~~ main.cpp:20:58: warning: right operand of comma operator has no effect [-Wunused-value] 20 | for (int i=0; i<a.size(); i++){ e=(e*10+a[i])%100,000,007;szor=szor*10;} | ^ main.cpp:25:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i=0; i<b.size(); i++) { | ~^~~~~~~~~ main.cpp:28:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if (i<a.size()){ell=(ell*10+b[i])%100,000,007;} | ~^~~~~~~~~ main.cpp:28:47: warning: right operand of comma operator has no effect [-Wunused-value] 28 | if (i<a.size()){ell=(ell*10+b[i])%100,000,007;} | ^~~ main.cpp:28:50: warning: right operand of comma operator has no effect [-Wunused-value] 28 | if (i<a.size()){ell=(ell*10+b[i])%100,000,007;} | ^ main.cpp:29:60: warning: right operand of comma operator has no effect [-Wunused-value] 29 | else{ ell=((ell-(b[i-a.size()]*szor))*10+b[i])%100,000,007; | ^~~ main.cpp:29:63: warning: right operand of comma operator has no effect [-Wunused-value] 29 | else{ ell=((ell-(b[i-a.size()]*szor))*10+b[i])%100,000,007; | ^ main.cpp:37:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for (int j=0; j<a.size(); j++) | ~^~~~~~~~~ main.cpp:46:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int i=0; i<v.size(); i++) g<<v[i]<<" "; | ~^~~~~~~~~ main.cpp:16:5: warning: unused variable 'z' [-Wunused-variable] 16 | int z=b.size()-a.size(); | ^