Compilare: user.cpp: In function ‘bool check(int, int)’: user.cpp:42:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:48:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:78:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void Solve(int, int)’: user.cpp:89:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:107:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(frr != -1 && frr < State.size()) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:116:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:123:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘void printSolution()’: user.cpp:149:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Sol[i].size(); j++) ^ user.cpp:147:13: warning: unused variable ‘cnt’ [-Wunused-variable] int cnt = 0; ^