Compilare: main.cpp: In function 'void dfs(int)': main.cpp:22:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfsReverse(int)': main.cpp:35:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<reverse[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void rebuildGraph(int)': main.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void newDfs(int)': main.cpp:82:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<newEdge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void findLenght(int)': main.cpp:104:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<topSort.size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:106:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<newEdge[node].size(); j++){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve(int)': main.cpp:126:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~