Compilare: main.cpp: In function 'int main()': main.cpp:31:15: warning: unused variable 'j' [-Wunused-variable] int S,n,k,i,j,g[100001],c[100001]; ^ main.cpp:32:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&k);; ^ main.cpp:34:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&g[i],&c[i]); ^