#include #define M 1000000007 typedef struct{ int l,r,m; } N; N ns[1<<17]; int ds[1<<17]; void nmul(N*p1,N*p2,N*pd){ if(p1->r<0){ pd->l=1ll*p1->l*p2->l%M; if(p2->r<0){ pd->r=-1; pd->m=1; }else{ pd->r=p2->r; pd->m=p2->m; } }else{ pd->l=p1->l; if(p2->r<0){ pd->r=1ll*p1->r*p2->l%M; pd->m=p1->m; }else{ pd->r=p2->r; pd->m=(p1->m+1ll*p1->r*p2->l+p2->m)%M; } } } void nadd(N*p1,N*p2,N*pd){ pd->l=p1->l; if(p2->r<0){ pd->r=p2->l; if(p1->r<0&&p2->r<0){ pd->m=0; }else{ pd->m=(p1->r+p1->m)%M; } }else{ pd->r=p2->r; if(p1->r<0){ pd->m=(p2->l+p2->m)%M; }else{ pd->m=(0ll+p1->m+p1->r+p2->l+p2->m)%M; } } } void ncalc(N*p1,N*p2,N*pd,int op){ (op=='*'?nmul:nadd)(p1,p2,pd); } void mk(int l,int r,int i,int j){ int i1=i*2+1; int i2=i*2+2; if(l==r-1){ // leaf ns[i].l=ds[l*2]; ns[i].r=-1; ns[i].m=1; }else{ // inter int c=(l+r)/2; if(j<0||j=c)mk(c,r,i2,j); ncalc(ns+i1,ns+i2,ns+i,ds[l+r-1]); } } N f(int l,int r,int i,int x,int y){ if(x<=l&&y>=r){ return ns[i]; } int c=(l+r)/2; if(y<=c){ return f(l,c,i*2+1,x,y); } if(x>=c){ return f(c,r,i*2+2,x,y); } { N nd; N nl=f(l,c,i*2+1,x,y); N nr=f(c,r,i*2+2,x,y); ncalc(&nl,&nr,&nd,ds[l+r-1]); return nd; } } main(n,q,i,t,x,y){ scanf("%d",&n); scanf("%d",ds); for(i=1;i