Compilare: main.cpp: In function 'int main()': main.cpp:77:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pairr>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for (e=0; e<s.size(); e++) | ~^~~~~~~~~ main.cpp:124:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pairr>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for (e=0; e<s.size(); e++) | ~^~~~~~~~~ main.cpp:124:17: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 124 | for (e=0; e<s.size(); e++) | ^~~ main.cpp:140:21: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 140 | cout << p << '\n'; | ^~~~