Compilare: user.cpp: In function ‘int main()’: user.cpp:47:93: warning: narrowing conversion of ‘((((long long int)stk[sz].Data::prd) * ((long long int)prdr)) % ((long long int)q))’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] stk[sz] = {stk[sz].l, mid, stk[sz].a, stk[sz].b, (1LL * stk[sz].prd * prdr) % q, 0, 0, 0}; ^ user.cpp:62:85: warning: narrowing conversion of ‘((((long long int)stk[sz].Data::prd) * ((long long int)prdl)) % ((long long int)q))’ from ‘long long int’ to ‘int’ inside { } [-Wnarrowing] stk[sz + 1] = {mid + 1, stk[sz].r, a, b, (1LL * stk[sz].prd * prdl) % q, 0, 0, 0}; ^ user.cpp:24:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d %d %d " ,&n,&a,&b,&p,&q); ^