//https://www.instagram.com/_modwwe/
#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2")
#include<bits/stdc++.h>
//#define int long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define checktime cerr << (double)clock() / CLOCKS_PER_SEC * 1000 << " ms";
using namespace std;
void phongbeo();
const int inf=1e9;
const int mod2=1e9+7;
const int mod1=998244353;
struct icd
{
int a,b,c,d,e,f;
};
struct ib
{
int a;
int b;
};
struct ic
{
int a,b,c;
};
struct id
{
int a,b,c,d;
};
struct ie
{
int a,b,c,d,e;
};
int n,m,s1,s2,s4,s3,sf,k,r,mid,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,l,s33;
int i,s10,s12;
int kk;
int el=29;
main()
{
#ifndef ONLINE_JUDGE
// fin(task),fou(task);
#endif
NHP
/// cin>>s1;
// modwwe
phongbeo();
}
string s;
struct BIT2D{
///https://hackmd.io/@socpite/rkM_5OWIn
vector<int>bit[300002];
vector<int> bit2[300002];
void fake_up(int x,int y,int z)
{
for(x;x<=n;x+=x&-x)
for(int y2=y;y2<=n;y2+=y2&-y2)
bit[x].pb(y2);
}
void fake_get(int x,int y)
{ int ss=0;
for(x;x;x-=x&-x)
for(int y2=y;y2;y2-=y2&-y2)
bit[x].pb(y2);
}
void fake_upd(int x, int y, int u, int v, int val) {
fake_up(x, y, val);
fake_up(x, v + 1, -val);
fake_up(u + 1, y, -val);
fake_up(u + 1, v + 1, val);
}
void setup()
{
for(int i=1;i<=n;i++){
if(bit[i].size()!=0){
bit[i].push_back(0);
sort(bit[i].begin(),bit[i].end());
bit[i].erase(unique(bit[i].begin(), bit[i].end()), bit[i].end());
bit2[i].assign(bit[i].size(),0);}
}
}
void up(int x,int y,int z)
{
for(x;x<=n;x+=x&-x)
for(int y2=lower_bound(bit[x].begin(),bit[x].end(),y)-bit[x].begin();y2<bit[x].size();y2+=y2&-y2){
/// cout<<y2<<"\n";
bit2[x][y2]+=z;}
}
int get(int x,int y)
{ int ss=0;
for(x;x;x-=x&-x)
for(int y2=lower_bound(bit[x].begin(),bit[x].end(),y)-bit[x].begin();y2;y2-=y2&-y2)
ss+=bit2[x][y2];
return ss;
}
void upd(int x, int y, int u, int v, int val) {
up(x, y, val);
up(x, v + 1, -val);
up(u + 1, y, -val);
up(u + 1, v + 1, val);
}
}cd;
vector<icd>v;
set<int> ss;
void phongbeo()
{
cin>>n>>m;
cin>>s;
for(int i=0;i<n;i++)
if(s[i]=='0')
ss.insert(i+1);
ss.insert(n+1);
for(int i=1;i<=m;i++)
{
string ss2;
cin>>ss2;
if(ss2[0]=='t'){cin>>l;
if(s[l-1]=='1')s[l-1]='0';else s[l-1]='1';
if(s[l-1]=='0')ss.insert(l);
else ss.erase(l);
set<int>::iterator ss3 = ss.lower_bound(l);
s3=*ss3;
s3--;
ss3++;
s2=*ss3;
if(s[l-1]=='0')
cd.fake_upd(s2,l,l,s3,i),v.pb({s2,l,l,s3,i,0});
else cd.fake_upd(s2,l,l,s3,-i),v.pb({s2,l,l,s3,-i,0});
}
else
{
cin>>l>>r;
r--;
cd.fake_get(l,r);
set<int>::iterator ss3 = ss.lower_bound(l);
s3=*ss3;
if(s3>r)v.pb({l,r,i,0,0,1});
else v.pb({l,r,0,0,0,1});
}
}
cd.setup();
for(auto x:v)
{
if(x.f==0)
{
cd.upd(x.a,x.b,x.c,x.d,x.e);
}
else
{
cout<<cd.get(x.a,x.b)+x.c,down
}
}
}
Compilation message
street_lamps.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
50 | main()
| ^~~~
street_lamps.cpp: In member function 'void BIT2D::fake_up(int, int, int)':
street_lamps.cpp:67:12: warning: statement has no effect [-Wunused-value]
67 | for(x;x<=n;x+=x&-x)
| ^
street_lamps.cpp: In member function 'void BIT2D::fake_get(int, int)':
street_lamps.cpp:74:19: warning: statement has no effect [-Wunused-value]
74 | for(x;x;x-=x&-x)
| ^
street_lamps.cpp:73:16: warning: unused variable 'ss' [-Wunused-variable]
73 | { int ss=0;
| ^~
street_lamps.cpp: In member function 'void BIT2D::up(int, int, int)':
street_lamps.cpp:97:12: warning: statement has no effect [-Wunused-value]
97 | for(x;x<=n;x+=x&-x)
| ^
street_lamps.cpp:98:88: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
98 | for(int y2=lower_bound(bit[x].begin(),bit[x].end(),y)-bit[x].begin();y2<bit[x].size();y2+=y2&-y2){
| ~~^~~~~~~~~~~~~~
street_lamps.cpp: In member function 'int BIT2D::get(int, int)':
street_lamps.cpp:105:19: warning: statement has no effect [-Wunused-value]
105 | for(x;x;x-=x&-x)
| ^
street_lamps.cpp:106:17: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
106 | for(int y2=lower_bound(bit[x].begin(),bit[x].end(),y)-bit[x].begin();y2;y2-=y2&-y2)
| ^~~
street_lamps.cpp:108:19: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
108 | return ss;
| ^~~~~~
street_lamps.cpp: In function 'void phongbeo()':
street_lamps.cpp:124:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
124 | if(s[i]=='0')
| ^~
street_lamps.cpp:126:10: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
126 | ss.insert(n+1);
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
14428 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
382 ms |
73684 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
15192 KB |
Output is correct |
| 2 |
Incorrect |
8 ms |
14940 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
14684 KB |
Output is correct |
| 2 |
Incorrect |
7 ms |
14940 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
4 ms |
14428 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
