Compilare: user.cpp: In function ‘bool bellman()’: user.cpp:50:35: 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:100:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mLeft.size();i++){ ^ user.cpp:109:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mRight.size();i++){ ^ user.cpp:118:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mLeft.size();i++){ ^ user.cpp:119:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<mRight.size();j++){ ^ user.cpp:79:35: 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:80:37: 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:82:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld",&n,&m); ^ user.cpp:88:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld %ld",&x,&y,&c); ^