Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:101:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[curr.vertex].size();i++) { ^ user.cpp: In function ‘int main()’: user.cpp:134:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=codes_count;i++) for(j=0;j<v[i].size();j++) v[i][j].w=1+rng.next(); ^ user.cpp:119:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cclj.in","r",stdin); ^ user.cpp:120:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cclj.out","w",stdout); ^ user.cpp:123:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &tests); ^ user.cpp:125:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^