This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,e,i,j,ii,jj,zx,xc,tes,t,f[300009],pas,sub2,fx[300009],fx2[300009],ans[300009],sub3,za,seg[1200009],l,r;
pair <string, pair <int, int> > p[300009];
string S;
int els(int q){
if(q==0) return 1; else return 0;
}
void read(int q, int w, int rr){
if(q>r||w<l) return;
if(q>=l&&w<=r){
pas=max(pas,seg[rr]);
return;
}
read(q,(q+w)/2,rr*2);
read((q+w)/2+1,w,rr*2+1);
}
int main(){
ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
cin>>a>>tes;
cin>>S;
S.insert(0,"0");
p[0].first="W";
for(i=1; i<=a; i++){
f[i]=S[i]-'0';
}
a++;
for(t=1; t<=tes; t++){
cin>>p[t].first;
if(p[t].first[0]=='q'){
cin>>p[t].second.first>>p[t].second.second;
}else{
cin>>p[t].second.first;
}
}
//N3
sub3=0;
for(i=1; i<a; i++){
fx[i]=f[i];
}
for(t=1; t<=tes; t++){
if(p[t].first[0]=='t'){
if(fx[p[t].second.first]==1){
sub3=1;
break;
}
fx[p[t].second.first]=1;
}
}
if(sub3==0){
za=1;
while(za<a) za*=2;
for(i=1; i<=za*2; i++){
seg[i]=tes+3;
}
for(i=1; i<a; i++){
if(f[i]==1){
c=i+za-1;
seg[c]=0;
c/=2;
while(c!=1){
seg[c]=max(seg[c*2],seg[c*2+1]);
c/=2;
}
}
}
for(t=1; t<=tes; t++){
if(p[t].first[0]=='t'){
c=p[t].second.first+za-1;
seg[c]=t;
c/=2;
while(c!=1){
seg[c]=max(seg[c*2],seg[c*2+1]);
c/=2;
}
}else{
l=p[t].second.first;r=p[t].second.second-1;
pas=0;
read(1,za,1);
cout<<max(0,t-pas)<<endl;
}
}
return 0;
}
// N2
sub2=0;
for(t=1; t<=tes; t++){
if(p[t].first[0]=='q'){
if(p[t].second.second!=p[t].second.first+1){
sub2=1;
break;
}
}
}
if(sub2==0){
for(i=1; i<=a; i++){
if(f[i]==1){
fx[i]=0;
fx2[i]=1;
}
}
for(t=1; t<=tes; t++){
if(p[t].first[0]=='t'){
c=p[t].second.first;
if(fx2[c]==0){
fx[c]=t;
fx2[c]=1;
}else{
ans[c]+=t-fx[c];
fx2[c]=0;
}
}else{
c=p[t].second.first;
if(fx2[c]==0){
cout<<ans[p[t].second.first]<<endl;
}else{
cout<<ans[p[t].second.first]+t-fx[c]<<endl;
}
}
}
return 0;
}
if(a<=102&&tes<=102){
for(i=1; i<=tes; i++){
if(p[i].first[0]=='t'){
f[p[i].second.first]=els(f[p[i].second.first]);
continue;
}
pas=0;
for(ii=i-1; ii>=0; ii--){
for(j=p[i].second.first; j<p[i].second.second; j++){
if(f[j]==0) break;
}
if(j==p[i].second.second){
pas++;
}
if(p[ii].first[0]=='t'){
f[p[ii].second.first]=els(f[p[ii].second.first]);
}
}
for(ii=1; ii<=i-1; ii++){
if(p[ii].first[0]=='t'){
f[p[ii].second.first]=els(f[p[ii].second.first]);
}
}
cout<<pas<<endl;
}
exit(0);
}
return 0;
}
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