Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[k].size(); ++i) ^ user.cpp: In function ‘void back(int)’: user.cpp:41:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k > terminalNodes.size()) { ^ user.cpp:44:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < terminalNodes.size(); ++i) ^ user.cpp:61:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < terminalNodes.size(); ++i) ^ user.cpp:59:7: warning: unused variable ‘sw’ [-Wunused-variable] int sw = 1; ^ user.cpp: In function ‘void preCompute(int)’: user.cpp:81:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < terminalNodes.size(); ++j) ^ user.cpp: In function ‘long long int BELLMAN_FORD()’: user.cpp:118:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < a[k].size(); ++i) { ^