Compilare: main.cpp: In function 'int main()': main.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < OUTPUT.size(); j++) ~~^~~~~~~~~~~~~~~ main.cpp:48:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int j = 0; j < OUTPUT.size(); j++) ^~~ main.cpp:51:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~