Compilare: main.cpp: In function 'int main()': main.cpp:57:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=a; i>=1; i--) ^~~ main.cpp:63:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(int i=0;i<k;i++) ^~~ main.cpp:79:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ans[nr].size();j++) ~^~~~~~~~~~~~~~~