Compilare: user.cpp: In function ‘void solve()’: user.cpp:69:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < table[lin].size(); ++i ) { ^ user.cpp:70:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( ind < table[lin - 1].size() && table[lin-1][ind].y < table[lin][i].x ) ^ user.cpp:72:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while( ind < table[lin - 1].size() && table[lin-1][ind].x <= table[lin][i].y ) { ^