Compilare: user.cpp: In function ‘bool bellman()’: user.cpp:51:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<list[node].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:101:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mLeft.size();i++){ ^ user.cpp:110:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mRight.size();i++){ ^ user.cpp:119:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mLeft.size();i++){ ^ user.cpp:120:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<mRight.size();j++){ ^ user.cpp:80:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("traseu.in","r",stdin); ^ user.cpp:81:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("traseu.out","w",stdout); ^ user.cpp:83:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld",&n,&m); ^ user.cpp:89:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld %ld",&x,&y,&c); ^