Compilare: user.cpp: In function ‘int main()’: user.cpp:47:7: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < ST.size() && ST[i].second == L) ~~^~~~~~~~~~~ user.cpp:61:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < DR.size() && DR[i].second != L) ~~^~~~~~~~~~~ user.cpp:63:2: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(sum <= mij); ^~ user.cpp:64:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ { ^