Compilare: user.cpp: In function ‘bool BellmanFord()’: user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:84:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<bigger.size();i++) ^ user.cpp:86:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<bigger.size();i++) ^ user.cpp:87:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<smaller.size();j++) ^ user.cpp:89:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<smaller.size();j++) ^ user.cpp:63:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("monede.in","r",stdin); ^ user.cpp:64:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("monede.out","w",stdout); ^ user.cpp:66:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:69:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^