Compilare: user.cpp: In function ‘int main()’: user.cpp:10:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &m, &l); ^ user.cpp:12:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[i]); ^ user.cpp:15:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &b[i]); ^ user.cpp:29:158: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((i>=l-1)&&(j>=l-1)&&((ans>a[dq[st]]+b[dq[st]+k])||((ans==a[dq[st]]+b[dq[st]+k])&&(sol>i-l+2))||((ans==a[dq[st]]+b[dq[st]+k])&&(sol==i-l+2)&&(rez>j-l+2)))){ ^ user.cpp:29:99: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((i>=l-1)&&(j>=l-1)&&((ans>a[dq[st]]+b[dq[st]+k])||((ans==a[dq[st]]+b[dq[st]+k])&&(sol>i-l+2))||((ans==a[dq[st]]+b[dq[st]+k])&&(sol==i-l+2)&&(rez>j-l+2)))){ ^