#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;
void speed()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
}
struct interval
{
int left, right, in_time;
interval(int _left, int _right, int _in_time)
{
left = _left;
right = _right;
in_time = _in_time;
}
bool operator < (const interval &it) const
{
return left < it.left;
}
};
const int maxn = 3e5 + 10;
struct base_query
{
string type;
int x, a, b;
} base_ask[maxn];
int n, q;
char c[maxn], cs[maxn];
void input()
{
cin >> n >> q;
n ++;
for (int i = 1; i < n; i ++)
cin >> c[i], cs[i] = c[i];
for (int i = 1; i <= q; i ++)
{
cin >> base_ask[i].type;
if (base_ask[i].type == "query")
{
cin >> base_ask[i].a >> base_ask[i].b;
}
else
{
cin >> base_ask[i].x;
}
}
}
set < pair < int, int > > available;
void create_intervals()
{
set < interval > st;
int beg = 1;
for (int i = 1; i < n; i ++)
{
if (c[i] == '0')
{
///cout << beg << " -- " << i << endl;
st.insert(interval(beg, i, 0));
available.insert({beg, i});
beg = i + 1;
}
}
st.insert(interval(beg, n, 0));
available.insert({beg, n});
for (int i = 1; i <= q; i ++)
{
if (base_ask[i].type == "toggle")
{
int pos = base_ask[i].x;
if (c[pos] == '0')
{
c[pos] = '1';
set < interval > :: iterator aft_it = st.lower_bound(interval(pos + 1, pos + 1, -1));
set < interval > :: iterator bef_it = prev(aft_it);
interval bef = *bef_it;
interval aft = *aft_it;
interval cur(bef.left, aft.right, i);
st.erase(bef);
st.erase(aft);
st.insert(cur);
available.insert({cur.left, cur.right});
}
else
{
c[pos] = '0';
set < interval > :: iterator cur_it = prev(st.lower_bound(interval(pos + 1, pos + 1, -1)));
interval cur = *cur_it;
interval bef(cur.left, pos, i);
interval aft(pos, cur.right, i);
st.erase(cur);
st.insert(bef);
st.insert(aft);
available.insert({bef.left, bef.right});
available.insert({aft.left, aft.right});
}
}
}
//for (pair < int, int > cur : available)
// cout << cur.first << " : " << cur.second << endl;
}
const int smalln = 110;
///int act[smalln][smalln], act_time[smalln][smalln], sum[smalln][smalln];
struct node
{
int act_cnt, sum;
node(int _act_cnt = 0, int _sum = 0)
{
act_cnt = _sum;
sum = _sum;
}
};
node merge_node(node bef, node aft)
{
node cur;
cur.act_cnt = bef.act_cnt + aft.act_cnt;
cur.sum = bef.sum + aft.sum;
return cur;
}
struct segment_tree
{
vector < node > tree;
int n;
segment_tree() {};
segment_tree(int _n)
{
n = _n;
tree.resize(4 * n);
}
void update_toggle(int root, int left, int right, int pos)
{
if (left == right)
{
tree[root].act_cnt ++;
tree[root].act_cnt %= 2;
return;
}
int mid = (left + right) / 2;
if (pos <= mid)
update_toggle(root * 2, left, mid, pos);
else
update_toggle(root * 2 + 1, mid + 1, right, pos);
tree[root] = merge_node(tree[root * 2], tree[root * 2 + 1]);
}
void update_add(int root, int left, int right, int pos, int val)
{
if (left == right)
{
tree[root].sum += val;
return;
}
int mid = (left + right) / 2;
if (pos <= mid)
update_add(root * 2, left, mid, pos, val);
else
update_add(root * 2 + 1, mid + 1, right, pos, val);
tree[root] = merge_node(tree[root * 2], tree[root * 2 + 1]);
}
node query_range(int root, int left, int right, int qleft, int qright)
{
if (left > qright || right < qleft)
return node();
if (left >= qleft && right <= qright)
return tree[root];
int mid = (left + right) / 2;
return merge_node(query_range(root * 2, left, mid, qleft, qright),
query_range(root * 2 + 1, mid + 1, right, qleft, qright));
}
void toggle(int pos)
{
update_toggle(1, 0, n - 1, pos);
}
void add(int pos, int val)
{
update_add(1, 0, n - 1, pos, val);
}
node query(int left, int right)
{
return query_range(1, 0, n - 1, left, right);
}
};
segment_tree seg[4 * maxn];
vector < pair < int, int > > tree[4 * maxn], values[maxn];
map < int, int > act_time[maxn], act[maxn];
int lower_bound_simulate(int root, pair < int, int > cur)
{
int lf = 0, rf = tree[root].size() - 1;
while(lf <= rf)
{
int mf = (lf + rf) / 2;
if (tree[root][mf].second < cur.second)
lf = mf + 1;
else if (tree[root][mf].second > cur.second)
rf = mf - 1;
else
{
if (tree[root][mf].first < cur.first)
lf = mf + 1;
else
rf = mf - 1;
}
}
return lf;
}
void toggle_node(int root, pair < int, int > cur, int cur_time)
{
int lf = lower_bound_simulate(root, cur);
seg[root].toggle(lf);
if (act[cur.first][cur.second] == 0)
{
///cout << "toggle " << root << " " << cur.first << " " << cur.second << endl;
seg[root].add(lf, cur_time - act_time[cur.first][cur.second]);
}
}
void toggle(int root, int left, int right, pair < int, int > cur, int cur_time)
{
///toggle_node(root, cur, cur_time);
if (left == right)
return;
int mid = (left + right) / 2;
if (cur.first <= mid)
toggle(root * 2, left, mid, cur, cur_time);
else
toggle(root * 2 + 1, mid + 1, right, cur, cur_time);
}
void update_interval(interval cur, int cur_time)
{
if (act[cur.left][cur.right] == 0)
{
act[cur.left][cur.right] = 1;
}
else
{
act[cur.left][cur.right] = 0;
}
///cout << "update " << cur.left << " " << cur.right << endl;
toggle(1, 1, n, {cur.left, cur.right}, cur_time);
if (act[cur.left][cur.right] == 1)
act_time[cur.left][cur.right] = cur_time;
}
int query(int root, int left, int right, pair < int, int > val, int cur_time)
{
if (left > val.first)
return 0;
if (right <= val.first)
{
///cout << root << " : " << left << " : " << right << " : " << val.first << " : " << val.second << endl;
int lf = lower_bound_simulate(root, {-1, val.second});
node cur = seg[root].query(lf, (int)(tree[root].size()) - 1);
int ans = cur.sum;
///cout << "here " << lf << " " << tree[root][lf].second << endl;
return ans;
}
int mid = (left + right) / 2;
return query(root * 2, left, mid, val, cur_time) +
query(root * 2 + 1, mid + 1, right, val, cur_time);
}
void conquer(int root, int lf, int rf)
{
int left = 0, right = 0;
while(left < tree[lf].size() && right < tree[rf].size())
{
if (tree[lf][left].second < tree[rf][right].second)
{
tree[root].push_back(tree[lf][left ++]);
}
else if (tree[lf][left].second > tree[rf][right].second)
{
tree[root].push_back(tree[rf][right ++]);
}
else if (tree[lf][left].first < tree[rf][right].first)
{
tree[root].push_back(tree[lf][left ++]);
}
else if (tree[lf][left].first > tree[rf][right].first)
{
tree[root].push_back(tree[rf][right ++]);
}
}
while(left < tree[lf].size())
tree[root].push_back(tree[lf][left ++]);
while(right < tree[rf].size())
tree[root].push_back(tree[rf][right ++]);
seg[root] = segment_tree(tree[root].size());
}
void divide(int root, int left, int right)
{
if (left == right)
{
tree[root] = values[left];
seg[root] = segment_tree(tree[root].size());
return;
}
int mid = (left + right) / 2;
divide(root * 2, left, mid);
divide(root * 2 + 1, mid + 1, right);
conquer(root, root * 2, root * 2 + 1);
}
void build_trees()
{
for (pair < int, int > cur : available)
{
values[cur.first].push_back(cur);
}
divide(1, 1, n);
}
void simulate()
{
set < interval > st;
int beg = 1;
for (int i = 1; i < n; i ++)
{
c[i] = cs[i];
if (c[i] == '0')
{
st.insert(interval(beg, i, 0));
update_interval(interval(beg, i, -1), 0);
beg = i + 1;
}
}
st.insert(interval(beg, n, 0));
update_interval(interval(beg, n, -1), 0);
///cout << "--------------" << endl;
for (int i = 1; i <= q; i ++)
{
if (base_ask[i].type == "toggle")
{
///cout << "toggle" << endl;
int pos = base_ask[i].x;
if (c[pos] == '0')
{
c[pos] = '1';
set < interval > :: iterator aft_it = st.lower_bound(interval(pos + 1, pos + 1, -1));
set < interval > :: iterator bef_it = prev(aft_it);
interval bef = *bef_it;
interval aft = *aft_it;
interval cur(bef.left, aft.right, i);
update_interval(bef, i);
update_interval(aft, i);
update_interval(cur, i);
st.erase(bef);
st.erase(aft);
st.insert(cur);
available.insert({cur.left, cur.right});
}
else
{
c[pos] = '0';
set < interval > :: iterator cur_it = prev(st.lower_bound(interval(pos + 1, pos + 1, -1)));
interval cur = *cur_it;
interval bef(cur.left, pos, i);
interval aft(pos + 1, cur.right, i);
///cout << " ::: " << bef.left << " " << bef.right << endl;
st.erase(cur);
st.insert(bef);
st.insert(aft);
update_interval(bef, i);
update_interval(aft, i);
update_interval(cur, i);
available.insert({bef.left, bef.right});
available.insert({aft.left, aft.right});
}
}
else
{
int ans = query(1, 1, n, {base_ask[i].a, base_ask[i].b}, i);
for (int l = 1; l <= base_ask[i].a; l ++)
for (int r = base_ask[i].b; r <= n; r ++)
{
///ans = ans + sum[l][r];
///cout << l << " -- " << r << " " << act[l][r] << endl;
if (act[l][r])
{
///cout << l << " " << r << " " << act_time[l][r] << endl;
ans = ans + i - act_time[l][r];
}
}
cout << ans << endl;
}
}
//for (pair < int, int > cur : available)
// cout << cur.first << " : " << cur.second << endl;
}
void solve()
{
input();
create_intervals();
build_trees();
simulate();
}
int main()
{
solve();
return 0;
}
/**
5 3
11011
toggle 2
toggle 1
query 1 2
*/
Compilation message
street_lamps.cpp: In function 'void conquer(int, int, int)':
street_lamps.cpp:310:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
310 | while(left < tree[lf].size() && right < tree[rf].size())
| ~~~~~^~~~~~~~~~~~~~~~~
street_lamps.cpp:310:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
310 | while(left < tree[lf].size() && right < tree[rf].size())
| ~~~~~~^~~~~~~~~~~~~~~~~
street_lamps.cpp:330:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
330 | while(left < tree[lf].size())
| ~~~~~^~~~~~~~~~~~~~~~~
street_lamps.cpp:333:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
333 | while(right < tree[rf].size())
| ~~~~~~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
55 ms |
115352 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3503 ms |
118316 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
100 ms |
127984 KB |
Output is correct |
| 2 |
Incorrect |
801 ms |
137652 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2079 ms |
138064 KB |
Output is correct |
| 2 |
Incorrect |
1551 ms |
138100 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
55 ms |
115352 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
