Compilare: main.cpp:14:13: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] int pd[1<<18+1][20]; ~~^~ main.cpp: In function 'int main()': main.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[0].size();++i) ~^~~~~~~~~~~~ main.cpp:21:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ main.cpp:25:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&x,&y,&c); ^