Compilare: main.cpp: In function 'int main()': main.cpp:47:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 1; i < v[x].size(); i++ ) ~~^~~~~~~~~~~~~ main.cpp:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 1; i < v[x].size(); i++ ) { ~~^~~~~~~~~~~~~ main.cpp:61:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < v[x].size(); i++ ) ~~^~~~~~~~~~~~~ main.cpp:62:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = i; j < v[x].size(); j++ ) ~~^~~~~~~~~~~~~ main.cpp:69:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int lg = 1; lg <= v[i].size() && lg <= w; lg++ ) { ~~~^~~~~~~~~~~~~~ main.cpp:34:13: warning: unused variable 'crt' [-Wunused-variable] int crt = 1; ^~~