Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:15:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:13:5: warning: variable 'nod_vecin' set but not used [-Wunused-but-set-variable] int nod_vecin; ^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:100:68: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] if(niv[lookup_table[i-1][j]]<=niv[lookup_table[i-1][j+(1<<i-1)]]) ~^~ main.cpp:103:53: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] lookup_table[i][j]=lookup_table[i-1][j+(1<<i-1)]; ~^~ main.cpp:32:29: warning: unused variable 'ans' [-Wunused-variable] int n, m, x, j, x1, y1, ans, logn, d, x2, y2, p2; ^~~ main.cpp:41:27: 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:45:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &x); ^ main.cpp:113:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &x1, &y1); ^