Compilare: main.cpp: In function 'void df1(int)': main.cpp:17:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for (i = 0; i < l[vf].size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void df2(int)': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (i = 0; i < t[vf].size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:22: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses] 49 | if (p[j] == mn[j] == 1) ctc[j] = nr; | ~~~~~^~~~~~~~