Compilare: main.cpp: In function 'int mkVec(int, int, int)': main.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( ind + 1 < T[l].size() && T[l][ind + 1] == c + 1 ) { ~~~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:102:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < T[coord[ind[i]].x].size(); ++j ) { ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:113:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = sol.size() - 1; i >= sol.size() - k; --i ) { ~~^~~~~~~~~~~~~~~~~