Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<=graf[nod].size()-1; ++i) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:70:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<=graf[nod].size()-1; ++i) ~^~~~~~~~~~~~~~~~~~~~ main.cpp:22:22: warning: unused variable 't' [-Wunused-variable] int maxim,imax,i,t,ultim; ^ main.cpp: In function 'int main()': main.cpp:180:21: warning: unused variable 'a' [-Wunused-variable] int a=(-1)*( nivel[tata[lant[x]]] - nivel[x] + 1); ^ main.cpp:181:21: warning: unused variable 'b' [-Wunused-variable] int b=drum[lant[x]].size()-1; ^ main.cpp:131:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n,&m); ^ main.cpp:133:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[i]); ^ main.cpp:136:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x,&y); ^ main.cpp:165:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &t,&x,&y); ^ main.cpp: In function 'void dfs(int, int)': main.cpp:71:30: warning: 'ultim' may be used uninitialized in this function [-Wmaybe-uninitialized] if( graf[nod][i]!=ultim and nivel[graf[nod][i]]>nivel[nod])