#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class T> using ordered_set = tree<T,null_type,less_equal<T>, rb_tree_tag,tree_order_statistics_node_update>;
/#define int long long
#define pb push_back
#define pii pair<int,int>
#define fr first
#define sc second
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define endi puts("");
#define ret return
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin(),s.rend()
const int N = 3e5+5,INF = 1e9+7;
int q[N],z[N],xo;
char s[N];
vector <pair<pii,int>> der[4*N];
void update(int v,int l,int r,int ql,int qr,int lol,int ror,int cost){
if (l > qr || r < ql)ret ;
if (ql <= l && r <= qr){
der[v].pb({{lol,ror},cost});
ret ;
}
int m = l+r>>1;
update(v<<1,l,m,ql,qr,lol,ror,cost);
update(v<<1|1,m+1,r,ql,qr,lol,ror,cost);
}
int get_ans(int v,int l,int r,int pos,int x){
int ans=0;
for (pair<pii,int> z: der[v])
if (z.fr.fr <= x && x <= z.fr.sc)
ans += z.sc,xo^=1;
if (l == r)ret ans;
int m = l+r>>1;
if (pos > m)
ret get_ans(v<<1|1,m+1,r,pos,x)+ans;
ret get_ans(v<<1,l,m,pos,x)+ans;
}
main(){
int n,t,i;
scanf("%d%d",&n,&t);
scanf("%s",s+1);
s[0] = s[n+1] = '0';
set <int> as;
for (i=0;i<=n+1;++i)
if (s[i] == '0')as.insert(i);
for (i=0;i<=n+1;++i){
if(s[i] == '0') continue;
int j=i;
while(j <= n+1 && s[j] == s[i]) j++;
update(1, 1, n, i, j-1, i, j-1, 0);
i = j - 1;
}
for (i=1;i<=t;++i){
char ss[7];
scanf("%s",ss);
if (ss[0] == 'q'){
int l,r;
scanf("%d%d",&l,&r);
r--;
xo = 0;
int ans = get_ans(1,1,n,l,r);
if (xo)ans += i;
printf("%d\n",ans);
}
else {
int pos;
scanf("%d",&pos);
if (s[pos] == '0'){
as.erase(pos);
int l = *--as.upper_bound(pos);
int r = *as.lower_bound(pos);
update(1,1,n,l+1,pos,pos,r-1,-i);
s[pos] = '1';
}
else {
int l = *--as.upper_bound(pos);
int r = *as.lower_bound(pos);
update(1,1,n,l+1,pos,pos,r-1,i);
s[pos] = '0';
as.insert(pos);
}
}
}
}
Compilation message
street_lamps.cpp:9:2: error: stray '#' in program
9 | /#define int long long
| ^
street_lamps.cpp:9:1: error: expected unqualified-id before '/' token
9 | /#define int long long
| ^
street_lamps.cpp:22:7: error: 'N' was not declared in this scope; did you mean 'NO'?
22 | int q[N],z[N],xo;
| ^
| NO
street_lamps.cpp:22:12: error: 'N' was not declared in this scope; did you mean 'NO'?
22 | int q[N],z[N],xo;
| ^
| NO
street_lamps.cpp:23:8: error: 'N' was not declared in this scope; did you mean 'NO'?
23 | char s[N];
| ^
| NO
street_lamps.cpp:24:30: error: 'N' was not declared in this scope; did you mean 'NO'?
24 | vector <pair<pii,int>> der[4*N];
| ^
| NO
street_lamps.cpp: In function 'void update(int, int, int, int, int, int, int, int)':
street_lamps.cpp:30:3: error: 'der' was not declared in this scope
30 | der[v].pb({{lol,ror},cost});
| ^~~
street_lamps.cpp:33:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
33 | int m = l+r>>1;
| ~^~
street_lamps.cpp: In function 'int get_ans(int, int, int, int, int)':
street_lamps.cpp:41:24: error: 'der' was not declared in this scope
41 | for (pair<pii,int> z: der[v])
| ^~~
street_lamps.cpp:46:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
46 | int m = l+r>>1;
| ~^~
street_lamps.cpp: At global scope:
street_lamps.cpp:56:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
56 | main(){
| ^~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:59:13: error: 's' was not declared in this scope
59 | scanf("%s",s+1);
| ^
street_lamps.cpp:58:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
58 | scanf("%d%d",&n,&t);
| ~~~~~^~~~~~~~~~~~~~
street_lamps.cpp:73:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
73 | scanf("%s",ss);
| ~~~~~^~~~~~~~~
street_lamps.cpp:76:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
76 | scanf("%d%d",&l,&r);
| ~~~~~^~~~~~~~~~~~~~
street_lamps.cpp:86:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
86 | scanf("%d",&pos);
| ~~~~~^~~~~~~~~~~
