#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pi = pair<int, int>;
const int mod = 1e9 + 7;
const int MAXN = 200005;
struct mtrx{
int a[2][2];
mtrx operator*(const mtrx &m)const{
mtrx ret;
memset(ret.a, 0, sizeof(ret.a));
for(int i=0; i<2; i++){
for(int j=0; j<2; j++){
for(int k=0; k<2; k++){
ret.a[j][k] += 1ll * a[j][i] * m.a[i][k] % mod;
if(ret.a[j][k] >= mod) ret.a[j][k] -= mod;
}
}
}
return ret;
}
}E, pwr[MAXN];
mtrx num(int n){
mtrx m;
m.a[1][0] = m.a[1][1] = (n % 2 == 0);
m.a[0][0] = (n + 1) / 2;
m.a[0][1] = (n - 1) / 2;
return m;
}
set<pi> s;
struct seg{
vector<mtrx> tree;
int lim;
void init(int n){
for(lim = 1; lim <= n; lim <<= 1);
tree.resize(2 * lim);
fill(tree.begin(), tree.end(), E);
}
void add(int x, mtrx v){
x += lim;
tree[x] = v;
while(x > 1){
x >>= 1;
tree[x] = tree[2*x] * tree[2*x+1];
}
}
mtrx query(){
return tree[1];
}
}seg;
struct seq{
int type;
int pos;
mtrx m;
};
vector<seq> instr;
vector<int> vect;
void batch(){
sort(vect.begin(), vect.end());
vect.resize(unique(vect.begin(), vect.end()) - vect.begin());
seg.init(vect.size());
for(auto &i : instr){
if(i.type == 2){
printf("%d\n", seg.query().a[0][0]);
}
else{
int pos = lower_bound(vect.begin(), vect.end(), i.pos) - vect.begin();
seg.add(pos, i.m);
}
}
}
int query(){
instr.push_back({2, -1, E});
}
void add_query(int pos, mtrx m){
vect.push_back(pos);
instr.push_back({1, pos, m});
}
void rem_query(int pos){
instr.push_back({1, pos, E});
}
void add(int x){
if(x == 0) x = 1;
if(x == -1) return;
auto ins = [](pi x){
auto itr = s.lower_bound(x);
int pos = 0;
if(itr != s.begin()) pos = prev(itr)->second;
if(itr != s.end()) rem_query(pos);
s.insert(x);
add_query(pos, num(x.first - pos));
if(x.first != x.second) add_query(x.first, pwr[(x.second - x.first) / 2]);
itr = s.upper_bound(x);
if(itr != s.end()){
add_query(x.second, num(itr->first - x.second));
}
};
auto rem = [](pi x){
if(x.first != x.second) rem_query(x.first);
auto itr = s.lower_bound(x);
int pos = 0;
if(itr != s.begin()) pos = prev(itr)->second;
if(next(itr) != s.end()) rem_query(x.second);
rem_query(pos);
s.erase(x);
itr = s.lower_bound(x);
if(itr != s.end()){
add_query(pos, num(itr->first - pos));
}
};
auto it = s.upper_bound(pi(x + 1, -1));
if(it != s.begin() && prev(it)->second >= x){
auto intv = *--it;
rem(intv);
if(intv.first % 2 == x % 2){
add(intv.second + 1);
intv.second = x - 2;
if(intv.first <= intv.second){
auto l = s.lower_bound(pi(intv.second + 3, -1));
auto nxt = pi(intv.first + 1, intv.second + 1);
if(l != s.end() && l->first == intv.second + 3){
nxt.second = l->second;
rem(*l);
}
ins(nxt);
}
add(intv.first - 2);
}
else{
ins(pi(intv.first, x - 1));
add(intv.second + 1);
}
}
else{
auto nxt = it;
if(nxt != s.begin()){
nxt = prev(nxt);
if(nxt->second == x - 1){
auto prv = *nxt;
rem(prv);
if(prv.first != prv.second){
prv.second -= 2;
ins(prv);
}
add(x + 1);
return;
}
if(nxt->second == x - 2){
auto l = s.lower_bound(pi(x + 1, -1));
if(l != s.end() && l->first == x + 1){
int pos = l->second + 1;
rem(*l);
add(pos);
}
else if(l != s.end() && l->first == x + 2){
auto it = *nxt;
it.second = l->second;
rem(*l);
rem(*nxt);
ins(it);
}
else{
auto it = *nxt;
it.second += 2;
rem(*nxt);
ins(it);
}
return;
}
}
auto l = s.lower_bound(pi(x + 1, -1));
if(l->first == x + 1){
int pos = l->second + 1;
rem(*l);
add(pos);
}
else if(l->first == x + 2){
auto nxt = *l; nxt.first -= 2;
rem(*l);
ins(nxt);
}
else{
ins(pi(x, x));
}
}
}
int main(){
E.a[0][0] = E.a[1][1] = 1;
pwr[0] = E;
pwr[1] = num(2);
for(int i=2; i<MAXN; i++) pwr[i] = pwr[i-1] * pwr[1];
int n, x;
scanf("%d",&n);
for(int i=0; i<n; i++){
scanf("%d",&x);
add(x);
query();
}
batch();
}
Compilation message
fib.cpp: In function 'int query()':
fib.cpp:82:1: warning: no return statement in function returning non-void [-Wreturn-type]
82 | }
| ^
fib.cpp: In function 'int main()':
fib.cpp:205:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
205 | scanf("%d",&n);
| ~~~~~^~~~~~~~~
fib.cpp:207:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
207 | scanf("%d",&x);
| ~~~~~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
6868 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
6868 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
11 ms |
6900 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
6868 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
6868 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
10 ms |
6868 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
