Compilare: main.cpp: In function 'void divide(int, int)': main.cpp:44:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<lft[i].size();j++){ ~^~~~~~~~~~~~~~ main.cpp:69:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<rigt[i].size();j++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:88:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&n,&len,&q); ^ main.cpp:90:56: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&x[i],&y[i],&c[i],&r[i]); ^ main.cpp:94:56: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&u[i],&v[i],&a[i],&b[i]); ^