Compilare: main.cpp: In function 'int nrRobots(int)': main.cpp:19:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < v1.size() ; i++) skipped[i] = false; ~~^~~~~~~~~~~ main.cpp:23:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1 ; i < v1.size() ; i++) { ~~^~~~~~~~~~~ main.cpp:32:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1 ; j < v1.size() && v1[j].first < crtLin + L ; j++) { ~~^~~~~~~~~~~