Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:24:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < G[X].size(); i ++ ) { ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:50:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < E[X].size(); i ++ ) { ^ user.cpp: In function ‘int main(int, const char**)’: user.cpp:100:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < G[i].size(); j ++ ) { ^ user.cpp:120:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < E[X].size(); j ++ ) { ^ user.cpp:133:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < SCC[ Heap[1] - 1 ].size(); i ++ ) ^ user.cpp:140:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < E[ Heap[1] ].size(); i ++ ) { ^ user.cpp:157:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < Sol.size(); i ++ ) ^