Compilare: user.cpp: In function ‘int main()’: user.cpp:76:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < g[ii].size(); i++){ ^ user.cpp:84:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); i++){ ^ user.cpp:109:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < g[ii].size(); i++){ ^ user.cpp:110:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r[ g[ii][i] ] == -g[ii].size()){ ^ user.cpp:121:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v2[nod].size(); j++){ ^ user.cpp:127:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r[r1] == -g[ii].size() || r[r2] == -g[ii].size()){ ^ user.cpp:127:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r[r1] == -g[ii].size() || r[r2] == -g[ii].size()){ ^ user.cpp:135:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < g[ii].size(); i++){ ^ user.cpp: In function ‘int num()’: user.cpp:43:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, DIM, fin); ^ user.cpp:52:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, DIM, fin); ^ user.cpp: In function ‘int main()’: user.cpp:58:26: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, DIM, fin); ^