Compilare: main.cpp: In function 'bool check(std::vector<sigma>&, long long int)': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<sigma>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i=0;i < a.size() && ook;i++){ | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<sigma>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i=0;i < a.size();i++){ | ~~^~~~~~~~~~ main.cpp:69:13: warning: unused variable 's1' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:17: warning: unused variable 's2' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:21: warning: unused variable 's3' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:25: warning: unused variable 's4' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:29: warning: unused variable 'e1' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:33: warning: unused variable 'e2' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:37: warning: unused variable 'e3' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~ main.cpp:69:41: warning: unused variable 'e4' [-Wunused-variable] 69 | int s1, s2, s3, s4, e1, e2, e3, e4; | ^~