#include <bits/stdc++.h>/*
#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")*/
using namespace std;
#define rep(i, n) for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
#define all(a) a.begin(),a.end()
#define pb emplace_back
#define eb emplace_back
#define lb(v,k) (lower_bound(all(v),k)-v.begin())
#define ub(v,k) (upper_bound(all(v),k)-v.begin())
#define fi first
#define se second
#define pi M_PI
#define PQ(T) priority_queue<T>
#define SPQ(T) priority_queue<T,vector<T>,greater<T>>
#define dame(a) {out(a);return 0;}
#define decimal cout<<fixed<<setprecision(15);
#define dupli(a) {sort(all(a));a.erase(unique(all(a)),a.end());}
typedef long long ll;
typedef pair<int,int> P;
typedef tuple<ll,ll,ll> PP;
typedef tuple<ll,ll,ll,ll> PPP;
typedef multiset<ll> S;
using vi=vector<ll>;
using vvi=vector<vi>;
using vvvi=vector<vvi>;
using vvvvi=vector<vvvi>;
using vp=vector<P>;
using vvp=vector<vp>;
using vb=vector<bool>;
using vvb=vector<vb>;
const ll inf=1001001001001001001;
const ll INF=1001001001;
const ll mod=1000000007;
const double eps=1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);}
template<class T> void yesno(T b){if(b)out("yes");else out("no");}
template<class T> void YesNo(T b){if(b)out("Yes");else out("No");}
template<class T> void YESNO(T b){if(b)out("YES");else out("NO");}
template<class T> void noyes(T b){if(b)out("no");else out("yes");}
template<class T> void NoYes(T b){if(b)out("No");else out("Yes");}
template<class T> void NOYES(T b){if(b)out("NO");else out("YES");}
void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b){ll res=1;a%=mod;while(b){if(b&1)res=res*a%mod;a=a*a%mod;b>>=1;}return res;}
vvp id;
vector<vector<int>> L,R,casc;
vector<int> x,y,s;
ll N;
vvi seg;
vi NN;
void initseg(){
NN=vi(N*2-1,1);
rep(t,N*2-1){
while(NN[t]<casc[t].size())NN[t]<<=1;
seg.pb(vi(NN[t]*2-1));
}
}
void add(ll t,ll i,ll x){
i=NN[t]+i-1;
seg[t][i]+=x;
while(i>0){
i=(i-1)/2;
seg[t][i]=seg[t][i*2+1]+seg[t][i*2+2];
}
}
ll getsum(ll t,ll a,ll b,ll k,ll l,ll r){
if(r<=a||b<=l)return 0;
if(a<=l&&r<=b)return seg[t][k];
ll c1=getsum(t,a,b,k*2+1,l,(l+r)/2);
ll c2=getsum(t,a,b,k*2+2,(l+r)/2,r);
return c1+c2;
}
bool cx(int a,int b){if(a>=x.size())return false;if(b>=x.size())return true;return x[a]<x[b];}
bool cy(int a,int b){if(a>=y.size())return false;if(b>=y.size())return true;return y[a]<y[b];}
void init_fractional_cascading(){ //(x座標,y座標,id)
N=1;
while(N<x.size())N<<=1;
s=x;rep(i,s.size())s[i]=i;
sort(all(s),cx);
casc=vector<vector<int>>(2*N-1);L=casc;R=casc;id=vvp(N);
rep(i,N){
if(i<s.size())casc[i+N-1].pb(s[i]);
else casc[i+N-1].pb(i);
}
for(int i=N-2;i>=0;i--){
ll a=0,b=0;
while(true){
L[i].pb(a);R[i].pb(b); // seg[i].size()+1回呼ばないとダメ（範囲外のやつ）
bool A=(a==casc[i*2+1].size()),B=(b==casc[i*2+2].size());
if(A&&B)break;
if(A||(!B&&cy(casc[i*2+2][b],casc[i*2+1][a])))casc[i].pb(casc[i*2+2][b++]);
else casc[i].pb(casc[i*2+1][a++]);
}
}
rep(i,2*N-1)rep(j,casc[i].size())id[casc[i][j]].pb(i,j);
}
ll answer_query(int i){
ll res=0;
for(auto t:id[i])res+=getsum(t.fi,0,t.se+1,0,0,NN[t.fi]);
return res;
}
void add_all(int x1,int x2,int y1,int y2,int k,int l,int r,ll X){//[x1,x2],[y1,y2],[l,r)
if(x2<=l||r<=x1)return;
if(x1<=l&&r<=x2){
//solve(y1,y2); //[a,b)+=xとかans+=b-aとか
if(y1!=casc[k].size())add(k,y1,X);
if(y2!=casc[k].size())add(k,y2,-X);
return;
}
add_all(x1,x2,L[k][y1],L[k][y2],k*2+1,l,(l+r)/2,X);
add_all(x1,x2,R[k][y1],R[k][y2],k*2+2,(l+r)/2,r,X);
}
ll LB(vector<int>&v,ll k,vi&x){
ll ok=v.size(),ng=-1;
while(ok-ng>1){
ll md=(ok+ng)/2;
if(x[v[md]]>=k)ok=md;else ng=md;
}
return ok;
}
void add_all(ll x1,ll x2,ll y1,ll y2,ll X){
x1=LB(s,x1,x);
x2=LB(s,x2+1,x);
y1=LB(casc[0],y1,y);
y2=LB(casc[0],y2+1,y);
add_all(x1,x2,y1,y2,0,0,N,X);
}
int main(){/*
cin.tie(0);
ios::sync_with_stdio(false);*/
ll n,q;cin>>n>>q;
string str;cin>>str;
vp query(q);
x=vector<int>(q);y=vector<int>(q);
rep(i,q){
string t;cin>>t;
if(t=="query"){
ll a,b;cin>>a>>b;
query[i]=P(a-1,b-2);
x[i]=a-1;y[i]=b-2;
}
else{
ll a;cin>>a;
query[i]=P(-1,a-1);
x[i]=0;y[i]=0;
}
}
init_fractional_cascading();
initseg();
set<ll> S;rep(i,n)if(str[i]=='0')S.insert(i);
rep(i,q){
if(query[i].fi==-1){
ll ID=query[i].se;
if(str[ID]=='0')S.erase(ID);
auto itr=S.lower_bound(ID);
ll a=0,b=n-1;
if(itr!=S.begin()){
itr--;a=(*itr)+1;itr++;
}
if(itr!=S.end())b=(*itr)-1;
if(str[ID]=='0')add_all(a,ID,ID,b,-(i+1));
else add_all(a,ID,ID,b,i+1);
if(str[ID]=='1')S.insert(ID);
str[ID]='1'+'0'-str[ID];
}
else{
ll res=answer_query(i);
auto itr=S.lower_bound(query[i].fi);
if(itr==S.end()||*itr>query[i].se)res+=i+1;
out(res);
}
}
}
Compilation message
street_lamps.cpp: In function 'void initseg()':
street_lamps.cpp:65:20: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
65 | while(NN[t]<casc[t].size())NN[t]<<=1;
street_lamps.cpp: In function 'bool cx(int, int)':
street_lamps.cpp:84:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
84 | bool cx(int a,int b){if(a>=x.size())return false;if(b>=x.size())return true;return x[a]<x[b];}
| ~^~~~~~~~~~
street_lamps.cpp:84:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
84 | bool cx(int a,int b){if(a>=x.size())return false;if(b>=x.size())return true;return x[a]<x[b];}
| ~^~~~~~~~~~
street_lamps.cpp: In function 'bool cy(int, int)':
street_lamps.cpp:85:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
85 | bool cy(int a,int b){if(a>=y.size())return false;if(b>=y.size())return true;return y[a]<y[b];}
| ~^~~~~~~~~~
street_lamps.cpp:85:54: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
85 | bool cy(int a,int b){if(a>=y.size())return false;if(b>=y.size())return true;return y[a]<y[b];}
| ~^~~~~~~~~~
street_lamps.cpp: In function 'void init_fractional_cascading()':
street_lamps.cpp:88:12: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
88 | while(N<x.size())N<<=1;
| ~^~~~~~~~~
street_lamps.cpp:93:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
93 | if(i<s.size())casc[i+N-1].pb(s[i]);
| ~^~~~~~~~~
street_lamps.cpp:100:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
100 | bool A=(a==casc[i*2+1].size()),B=(b==casc[i*2+2].size());
| ~^~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:100:48: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
100 | bool A=(a==casc[i*2+1].size()),B=(b==casc[i*2+2].size());
| ~^~~~~~~~~~~~~~~~~~~~
street_lamps.cpp: In function 'void add_all(int, int, int, int, int, int, int, ll)':
street_lamps.cpp:117:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
117 | if(y1!=casc[k].size())add(k,y1,X);
| ~~^~~~~~~~~~~~~~~~
street_lamps.cpp:118:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
118 | if(y2!=casc[k].size())add(k,y2,-X);
| ~~^~~~~~~~~~~~~~~~
street_lamps.cpp: In function 'void add_all(ll, ll, ll, ll, ll)':
street_lamps.cpp:133:16: error: invalid initialization of reference of type 'vi&' {aka 'std::vector<long long int>&'} from expression of type 'std::vector<int>'
133 | x1=LB(s,x1,x);
| ^
street_lamps.cpp:124:29: note: in passing argument 3 of 'll LB(std::vector<int>&, ll, vi&)'
124 | ll LB(vector<int>&v,ll k,vi&x){
| ~~~^
street_lamps.cpp:134:18: error: invalid initialization of reference of type 'vi&' {aka 'std::vector<long long int>&'} from expression of type 'std::vector<int>'
134 | x2=LB(s,x2+1,x);
| ^
street_lamps.cpp:124:29: note: in passing argument 3 of 'll LB(std::vector<int>&, ll, vi&)'
124 | ll LB(vector<int>&v,ll k,vi&x){
| ~~~^
street_lamps.cpp:135:22: error: invalid initialization of reference of type 'vi&' {aka 'std::vector<long long int>&'} from expression of type 'std::vector<int>'
135 | y1=LB(casc[0],y1,y);
| ^
street_lamps.cpp:124:29: note: in passing argument 3 of 'll LB(std::vector<int>&, ll, vi&)'
124 | ll LB(vector<int>&v,ll k,vi&x){
| ~~~^
street_lamps.cpp:136:24: error: invalid initialization of reference of type 'vi&' {aka 'std::vector<long long int>&'} from expression of type 'std::vector<int>'
136 | y2=LB(casc[0],y2+1,y);
| ^
street_lamps.cpp:124:29: note: in passing argument 3 of 'll LB(std::vector<int>&, ll, vi&)'
124 | ll LB(vector<int>&v,ll k,vi&x){
| ~~~^
