#include<stdio.h>
#include<stdlib.h>
#define N 300000
#define Q 300000
int n, q, *eh[N+1], eo[N+1];
long long d,ans[Q];
void push(int i,int j)
{
int o=eo[i]++;
if(!o)eh[i]=(int*)malloc(2*sizeof**eh);
else if(!(o&o-1))eh[i]=(int*)realloc(eh[i],2*o*sizeof**eh);
eh[i][o]=j;
}
/*
* sweep from left to right,
*
* decompose fishes to dominoes
*
* amortized O(n) dominoes move
*
*
* need segtree that can
* decrease k from a[l..r], add k to b[l..r]
* point query a[i]
* range query b[l..r]
*/
#define N_ (((N+1)<<2)+1)
long long ta[N_], la[N_], tb[N_], lb[N_], c;
int dominoes[N+1], top;
void pul(int v,int l,int r)
{
long long ww=r-l+1;
ta[v] = ta[2*v] + ta[2*v+1] + ww * (la[2*v] + la[2*v+1]);
tb[v] = tb[2*v] + tb[2*v+1] + ww * (lb[2*v] + lb[2*v+1]);
}
void add(int x,int y,long long k,long long k2,int v,int l,int r)
{
if (r < x || y < l) return;
if (x <= l && r <= y)
{
la[v] += k;
lb[v] += k2;
return;
}
add(x, y, k, k2, 2*v, l, l+(r-l)/2);
add(x, y, k, k2, 2*v+1, l+(r-l)/2+1, r);
pul(v, l, r);
}
void add_(int x,int y,long long k,long long k2) { add(x, y, k, k2, 1, 0, n); }
long long query1(int p,int v,int l,int r)
{
if(l==r)return ta[v] + (r-l+1ll) * la[v];
return la[v] * (r-l+1ll) + (p <= l+(r-l)/2 ? query1(p,2*v,l,l+(r-l)/2): query1(p,2*v+1,l+(r-l)/2+1,r));
}
long long query1_(int p) { return query1(p, 1, 0, n); }
long long query2(int x,int y,int v,int l,int r)
{
if(r<x||y<l)return 0;
if (x<=l&&r<=y) return lb[v] * (r-l+1ll) + tb[v];
return lb[v] * (r-l+1ll) + query2(x, y, 2*v, l, l+(r-l)/2) + query2(x, y, 2*v+1, l+(r-l)/2+1, r);
}
long long query2_(int x,int y) { return query2(x, y, 1, 0, n); }
int broken = 0;
void fix(int r)
{
long long delta = query1_(r-1) - query1_(r);
if (delta <= 0)
return;
int ii = (delta + d - 1) / d;
if (query1_(dominoes[top]) < d * ii)
{
int lower = dominoes[top], upper = r;
while (upper - lower > 1)
{
int mid = lower + (upper - lower) / 2;
if (query1_(mid) < d * ii) lower = mid;
else upper = mid;
}
if (lower > broken)
broken = lower;
}
add_(dominoes[top], r-1, ii * d, ii);
}
int main()
{
scanf("%d%lld",&n,&d);
add_(0, 0, -1e18, 0);
for(int i=1;i<=n;++i)scanf("%lld",&c), add_(i, i, c, 0);
scanf("%d",&q);
for(int ll,rr,i=0;i<q;++i)scanf("%d%d",&ll,&rr),push(rr,i),push(rr,ll);
for(int r=1;r<=n;++r)
{
fix(r);
while (top && query1_(dominoes[top]) - query1_(dominoes[top]-1) < d)
fix(dominoes[top--]);
if (query1_(r) - query1_(r-1) >= d)
dominoes[++top] = r;
for(int j=0;j<eo[r];j+=2)
{
int ll=eh[r][j+1], ii=eh[r][j];
if (broken >= dominoes[top])
ans[ii] = -1;
else
ans[ii] = query2_(ll, r);
}
}
for(int i=0;i<q;++i)printf("%lld\n",ans[i]);
}
Compilation message
Main.c: In function 'push':
Main.c:15:18: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
15 | else if(!(o&o-1))eh[i]=(int*)realloc(eh[i],2*o*sizeof**eh);
| ~^~
Main.c: In function 'main':
Main.c:101:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
101 | scanf("%d%lld",&n,&d);
| ^~~~~~~~~~~~~~~~~~~~~
Main.c:103:26: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
103 | for(int i=1;i<=n;++i)scanf("%lld",&c), add_(i, i, c, 0);
| ^~~~~~~~~~~~~~~~
Main.c:105:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
105 | scanf("%d",&q);
| ^~~~~~~~~~~~~~
Main.c:106:31: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
106 | for(int ll,rr,i=0;i<q;++i)scanf("%d%d",&ll,&rr),push(rr,i),push(rr,ll);
| ^~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
10584 KB |
Output is correct |
| 2 |
Correct |
1 ms |
10588 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
10588 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
419 ms |
41276 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
108 ms |
18300 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
381 ms |
31140 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
10584 KB |
Output is correct |
| 2 |
Correct |
1 ms |
10588 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
10588 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
