Compilare: user.cpp: In function ‘int main()’: user.cpp:31:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d", &n, &m, &a); ^ user.cpp:32:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n; i++) fscanf(fi,"%d", &v[i]); ^ user.cpp:33:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int j = 1; j <= m; j++) fscanf(fi,"%d", &w[j]); ^ user.cpp: In function ‘void F(int)’: user.cpp:23:40: warning: ‘cnt’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(val == max) nmax += cnt; ^ user.cpp:23:14: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(val == max) nmax += cnt; ^