Compilare: user.cpp: In function ‘bool dfs(int)’: user.cpp:13:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < B[nod].size(); i++) ^ user.cpp: In function ‘bool cuplajPerfect(int, int)’: user.cpp:46:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < B[i].size(); j++) ^ user.cpp: In function ‘int caut(int, int, int)’: user.cpp:104:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:109:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("caroiaj.in", "r", stdin); ^ user.cpp:110:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &teste); ^ user.cpp:113:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:119:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[l][c]); ^