#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <bits/stdc++.h>
using namespace std;
using namespace __gnu_pbds;
template <class T> using Tree = tree<T, null_type, less<T>,
rb_tree_tag, tree_order_statistics_node_update>;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using db = double;
using str = string; // yay python!
using pi = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<db>;
using vs = vector<str>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vpd = vector<pd>;
#define tcT template<class T
// ^ lol this makes everything look weird but I'll try it
tcT> using V = vector<T>;
tcT, size_t SZ> using AR = array<T,SZ>;
// pairs
#define mp make_pair
#define f first
#define s second
// vectors
#define sz(x) (int)(x).size()
#define all(x) begin(x), end(x)
#define rall(x) (x).rbegin(), (x).rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pf push_front
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
// loops
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
const int MOD = 1e9+7; // 998244353;
const int MX = 2e5+5;
const ll INF = 1e18; // not too close to LLONG_MAX
const int IINF = 1e9;
const ld PI = acos((ld)-1);
const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
// helper funcs
constexpr int pct(int x) { return __builtin_popcount(x); } // # of bits set
constexpr int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x))
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
tcT> bool ckmin(T& a, const T& b) {
return b < a ? a = b, 1 : 0; } // set a = min(a,b)
tcT> bool ckmax(T& a, const T& b) {
return a < b ? a = b, 1 : 0; }
#define tcTU tcT, class U
tcTU> T fstTrue(T lo, T hi, U f) {
hi ++; assert(lo <= hi); // assuming f is increasing
while (lo < hi) { // find first index such that f is true
T mid = lo+(hi-lo)/2;
f(mid) ? hi = mid : lo = mid+1;
}
return lo;
}
tcTU> T lstTrue(T lo, T hi, U f) {
lo --; assert(lo <= hi); // assuming f is decreasing
while (lo < hi) { // find first index such that f is true
T mid = lo+(hi-lo+1)/2;
f(mid) ? lo = mid : hi = mid-1;
}
return lo;
}
tcT> void remDup(vector<T>& v) { // sort and remove duplicates
sort(all(v)); v.erase(unique(all(v)),end(v)); }
tcTU> void erase(T& t, const U& u) { // don't erase
auto it = t.find(u); assert(it != end(t));
t.erase(u); } // element that doesn't exist from (multi)set
// INPUT
#define tcTUU tcT, class ...U
tcT> void re(complex<T>& c);
tcTU> void re(pair<T,U>& p);
tcT> void re(vector<T>& v);
tcT, size_t SZ> void re(AR<T,SZ>& a);
tcT> void re(T& x) { cin >> x; }
void re(db& d) { str t; re(t); d = stod(t); }
void re(ld& d) { str t; re(t); d = stold(t); }
tcTUU> void re(T& t, U&... u) { re(t); re(u...); }
tcT> void re(complex<T>& c) { T a,b; re(a,b); c = {a,b}; }
tcTU> void re(pair<T,U>& p) { re(p.f,p.s); }
tcT> void re(vector<T>& x) { trav(a,x) re(a); }
tcT, size_t SZ> void re(AR<T,SZ>& x) { trav(a,x) re(a); }
// TO_STRING
#define ts to_string
str ts(char c) { return str(1,c); }
str ts(const char* s) { return (str)s; }
str ts(str s) { return s; }
str ts(bool b) {
#ifdef LOCAL
return b ? "true" : "false";
#else
return ts((int)b);
#endif
}
tcT> str ts(complex<T> c) {
stringstream ss; ss << c; return ss.str(); }
str ts(vector<bool> v) {
str res = "{"; F0R(i,sz(v)) res += char('0'+v[i]);
res += "}"; return res; }
template<size_t SZ> str ts(bitset<SZ> b) {
str res = ""; F0R(i,SZ) res += char('0'+b[i]);
return res; }
tcTU> str ts(pair<T,U> p);
tcT> str ts(T v) { // containers with begin(), end()
#ifdef LOCAL
bool fst = 1; str res = "{";
for (const auto& x: v) {
if (!fst) res += ", ";
fst = 0; res += ts(x);
}
res += "}"; return res;
#else
bool fst = 1; str res = "";
for (const auto& x: v) {
if (!fst) res += " ";
fst = 0; res += ts(x);
}
return res;
#endif
}
tcTU> str ts(pair<T,U> p) {
#ifdef LOCAL
return "("+ts(p.f)+", "+ts(p.s)+")";
#else
return ts(p.f)+" "+ts(p.s);
#endif
}
// OUTPUT
tcT> void pr(T x) { cout << ts(x); }
tcTUU> void pr(const T& t, const U&... u) {
pr(t); pr(u...); }
void ps() { pr("\n"); } // print w/ spaces
tcTUU> void ps(const T& t, const U&... u) {
pr(t); if (sizeof...(u)) pr(" "); ps(u...); }
// DEBUG
void DBG() { cerr << "]" << endl; }
tcTUU> void DBG(const T& t, const U&... u) {
cerr << ts(t); if (sizeof...(u)) cerr << ", ";
DBG(u...); }
#ifdef LOCAL // compile with -DLOCAL, chk -> fake assert
#define dbg(...) cerr << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#define chk(...) if (!(__VA_ARGS__)) cerr << "Line(" << __LINE__ << ") -> function(" \
<< __FUNCTION__ << ") -> CHK FAILED: (" << #__VA_ARGS__ << ")" << "\n", exit(0);
#else
#define dbg(...) 0
#define chk(...) 0
#endif
// FILE I/O
void setIn(str s) { freopen(s.c_str(),"r",stdin); }
void setOut(str s) { freopen(s.c_str(),"w",stdout); }
void unsyncIO() { cin.tie(0)->sync_with_stdio(0); }
void setIO(str s = "") {
unsyncIO();
// cin.exceptions(cin.failbit);
// throws exception when do smth illegal
// ex. try to read letter into int
if (sz(s)) { setIn(s+".in"), setOut(s+".out"); } // for USACO
}
struct custom_hash {
static uint64_t splitmix64(uint64_t x) {
// http://xorshift.di.unimi.it/splitmix64.c
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const {
static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
template<class T> struct Seg { // comb(ID,b) = b
const T ID = 0; T comb(T a, T b) { return a+b; }
int n; vector<T> seg;
void init(int _n) { n = _n; seg.assign(2*n,ID); }
void pull(int p) { seg[p] = comb(seg[2*p],seg[2*p+1]); }
void upd(int p, T val) { // set val at position p
seg[p += n] += val; for (p /= 2; p; p /= 2) pull(p); }
void clean(int p, T val) { // set val at position p
seg[p += n] = val; for (p /= 2; p; p /= 2) pull(p); }
T query(int l, int r) { // sum on interval [l, r]
T ra = ID, rb = ID;
for (l += n, r += n+1; l < r; l /= 2, r /= 2) {
if (l&1) ra = comb(ra,seg[l++]);
if (r&1) rb = comb(seg[--r],rb);
}
return comb(ra,rb);
}
};
struct i{
int t, l, r, type, qidx;
i(int _t, int _l, int _r, int _type = -1):t(_t),l(_l),r(_r),type(_type){} // 0 = add, 1 = remove, 2 = query
};
const ll MAX = 300005;
ll ans[MAX];
bitset<MAX> state;
struct cmp {
bool operator()(const i& x, const i& y) const { return x.l < y.l; }
};
Seg<ll> tree1, tree2;
Seg<int> n1, n2;
void cdq(vector<i>& d, int l, int r){
if(l + 1 == r)
return;
int m = (l + r) / 2;
vector<i> left, right;
trav(a, d)
if(a.t < m)
left.pb(a);
else
right.pb(a);
cdq(left, l, m);
cdq(right, m, r);
int i = 0;
int k = 0;
set<int> r1, r2;
F0R(j, sz(right)){
while(i < sz(left) && left[i].l <= right[j].l){
d[k++] = left[i];
if(left[i].type == 0){
n1.upd(left[i].r, 1);
tree1.upd(left[i].r, MAX - left[i].t);
r1.insert(left[i].r);
}
else if(left[i].type == 1){
n2.upd(left[i].r, 1);
tree2.upd(left[i].r, MAX - left[i].t);
r2.insert(left[i].r);
}
i++;
}
if(right[j].type == 2){
ans[right[j].qidx] += (tree1.query(right[j].r - 1, MAX - 1) - n1.query(right[j].r - 1, MAX - 1) * (MAX - right[j].t));
ans[right[j].qidx] -= (tree2.query(right[j].r - 1, MAX - 1) - n2.query(right[j].r - 1, MAX - 1) * (MAX - right[j].t));
}
d[k++] = right[j];
}
while(i < sz(left))
d[k++] = left[i++];
trav(a, r1)
tree1.clean(a, 0), n1.clean(a, 0);
trav(a, r2)
tree2.clean(a, 0), n2.clean(a, 0);
}
int main(){
setIO();
tree1.init(524288), tree2.init(524288);
n1.init(524288), n2.init(524288);
vector<i> d;
int n, q;
cin >> n >> q;
set<i, cmp> segs;
string s;
cin >> s;
F0R(a, n){
state[a] = (s[a] == '1');
if(state[a] == 0)
continue;
if(a != 0 && state[a - 1] == 1){
auto t = --segs.end();
i temp(t->t, t->l, t->r + 1);
segs.erase(t);
segs.insert(temp);
}
else
segs.insert(i(0, a, a));
}
set<int> stor;
FOR(a, 1, q + 1){
string s;
cin >> s;
if(s == "toggle"){
int x;
cin >> x;
x--;
state[x] = state[x] ^ 1;
if(state[x] == 1){
i nxt(a, x, x);
auto t1 = segs.lb({IINF, x, IINF});
if(t1 != segs.begin() && (--t1)->r == x - 1)
nxt.l = t1->l, d.pb({t1->t, t1->l, t1->r, 0}), d.pb({a, t1->l, t1->r, 1}), segs.erase(t1);
auto t2 = segs.lb({IINF, x, IINF});
if(t2 != segs.end() && t2->l == x + 1)
nxt.r = t2->r, d.pb({t2->t, t2->l, t2->r, 0}), d.pb({a, t2->l, t2->r, 1}), segs.erase(t2);
segs.insert(nxt);
}
else{
auto temp = segs.lb({IINF, x, IINF});
temp--;
d.pb({temp->t, temp->l, temp->r, 1});
d.pb({a, temp->l, temp->r, 0});
if(temp->l != x)
segs.insert({a, temp->l, x - 1});
if(temp->r != x)
segs.insert({a, x + 1, temp->r});
}
}
else{
int A, B;
cin >> A >> B;
A--, B--;
d.pb({a, A, B, 2});
d.back().qidx = a;
stor.insert(a);
}
}
trav(a, segs)
d.pb({q + 1, a.l, a.r, 1}), d.pb({a.t, a.l, a.r, 0});
sort(all(d), [](const i& a, const i& b){return (a.t == b.t ? a.type < b.type : a.t < b.t);});
cdq(d, 0, q + 2);
trav(a, stor)
cout << ans[a] << endl;
// you should actually read the stuff at the bottom
}
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
*/
Compilation message
street_lamps.cpp: In function 'void setIn(str)':
street_lamps.cpp:190:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
190 | void setIn(str s) { freopen(s.c_str(),"r",stdin); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp: In function 'void setOut(str)':
street_lamps.cpp:191:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
191 | void setOut(str s) { freopen(s.c_str(),"w",stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
24940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1200 ms |
64356 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
25196 KB |
Output is correct |
| 2 |
Incorrect |
19 ms |
25196 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
20 ms |
25196 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
14 ms |
24940 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
