Compilare: main.cpp: In function 'int main()': main.cpp:47:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < ed[i].size() ; j++){ ~~^~~~~~~~~~~~~~ main.cpp:16:19: warning: unused variable 'sum' [-Wunused-variable] long long x , sum = 0; ^~~ main.cpp:28:30: 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:30:58: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%lld",&p[i].st,&p[i].dr,&p[i].x); ^