#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
struct A
{
int l,r;
int nxl,nxr,nxt;
int con;
}Node[20000005];
int now=1;
char temp[15];
char all[300005];
int Find(int x,int y,int here)
{
if(here==-1) return 0;
int t;
//printf("aa %d\n",Node[here].con);
if(Node[here].nxt==-2)
{
t=Node[here].con;
if(Node[here].l==y&&Node[here].r==y) return t;
else if(y<=(Node[here].l+Node[here].r)/2) t+=Find(x,y,Node[here].nxl);
else t+=Find(x,y,Node[here].nxr);
}
else
{
t=Node[here].con;
t+=Find(x,y,Node[here].nxt);
if(Node[here].l==x&&Node[here].r==x) return t;
else if(x<=(Node[here].l+Node[here].r)/2) t+=Find(x,y,Node[here].nxl);
else t+=Find(x,y,Node[here].nxr);
}
//printf("%d %d %d %d\n",Node[here].l,Node[here].r,Node[here].nxt,t);
return t;
}
void build(int l,int r,int con,int here)
{
Node[here].l=l;
Node[here].r=r;
Node[here].nxt=con;
Node[here].nxl=-1;
Node[here].nxr=-1;
Node[here].con=0;
}
void cha(int l1,int r1,int l2,int r2,int con,int here)
{
int t;
//printf("%d %d %d %d %d %d\n",l1,r1,l2,r2,here,Node[here].nxt);
if(Node[here].nxt==-2)
{
//return ;
if(Node[here].l==l2&&Node[here].r==r2)
{
Node[here].con+=con;
return ;
}
if(Node[here].nxl==-1)
{
Node[here].nxl=now++;
build(Node[here].l,(Node[here].l+Node[here].r)/2,-2,Node[here].nxl);
}
if(Node[here].nxr==-1)
{
Node[here].nxr=now++;
build((Node[here].l+Node[here].r)/2+1,Node[here].r,-2,Node[here].nxr);
}
if(r2<=(Node[here].l+Node[here].r)/2) cha(l1,r1,l2,r2,con,Node[here].nxl);
else if(l2>(Node[here].l+Node[here].r)/2) cha(l1,r1,l2,r2,con,Node[here].nxr);
else
{
cha(l1,r1,l2,(Node[here].l+Node[here].r)/2,con,Node[here].nxl);
cha(l1,r1,(Node[here].l+Node[here].r)/2+1,r2,con,Node[here].nxr);
}
}
else
{
if(Node[here].nxt==-1)
{
Node[here].nxt=now++;
build(0,300000,-2,Node[here].nxt);
}
if(Node[here].l==l1&&Node[here].r==r1)
{
cha(l1,r1,l2,r2,con,Node[here].nxt);
return;
}
if(Node[here].nxl==-1)
{
Node[here].nxl=now++;
build(Node[here].l,(Node[here].l+Node[here].r)/2,-1,Node[here].nxl);
}
if(Node[here].nxr==-1)
{
Node[here].nxr=now++;
build((Node[here].l+Node[here].r)/2+1,Node[here].r,-1,Node[here].nxr);
}
if(r1<=(Node[here].l+Node[here].r)/2) cha(l1,r1,l2,r2,con,Node[here].nxl);
else if(l1>(Node[here].l+Node[here].r)/2) cha(l1,r1,l2,r2,con,Node[here].nxr);
else
{
cha(l1,(Node[here].l+Node[here].r)/2,l2,r2,con,Node[here].nxl);
cha((Node[here].l+Node[here].r)/2+1,r1,l2,r2,con,Node[here].nxr);
}
}
}
int main()
{
int N,M,t,l,r,l1,r1,l2,r2,i,j,where,ok;
scanf("%d %d",&N,&M);
scanf("%s",all+1);
build(0,300000,-1,0);
l=1;
r=0;
for(i=1;i<=N;i++)
{
if(all[i]=='1') r=i;
else
{
if(r>=l) cha(l,r+1,l,r+1,M,0);
l=i+1;
r=i;
}
}
if(r>=l) cha(l,r+1,l,r+1,M,0);
for(i=1;i<=M;i++)
{
scanf("%s",temp);
if(temp[0]=='t')
{
scanf("%d",&where);
if(all[where]=='0')
{
r1=where;
l1=where;
for(j=where-1;j>=1;j--)
{
if(all[j]=='1') l1=j;
else break;
}
l2=where+1;
r2=where+1;
for(j=where+1;j<=N;j++)
{
if(all[j]=='1') r2=j+1;
else break;
}
cha(l1,r1,l2,r2,M-i,0);
}
else
{
r1=where;
l1=where;
for(j=where-1;j>=1;j--)
{
if(all[j]=='1') l1=j;
else break;
}
l2=where+1;
r2=where+1;
for(j=where+1;j<=N;j++)
{
if(all[j]=='1') r2=j+1;
else break;
}
cha(l1,r1,l2,r2,i-M,0);
}
all[where]=1-(all[where]-'0')+'0';
}
else
{
scanf("%d %d",&l,&r);
ok=1;
for(j=l;j<=r;j++) if(all[j]=='0') ok=0;
printf("%d\n",Find(l,r,0)-(M-i)*ok);
}
}
return 0;
}
Compilation message
street_lamps.cpp: In function 'void cha(int, int, int, int, int, int)':
street_lamps.cpp:50:9: warning: unused variable 't' [-Wunused-variable]
int t;
^
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:112:13: warning: unused variable 't' [-Wunused-variable]
int N,M,t,l,r,l1,r1,l2,r2,i,j,where,ok;
^
street_lamps.cpp:113:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d",&N,&M);
~~~~~^~~~~~~~~~~~~~~
street_lamps.cpp:114:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%s",all+1);
~~~~~^~~~~~~~~~~~
street_lamps.cpp:131:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%s",temp);
~~~~~^~~~~~~~~~~
street_lamps.cpp:134:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&where);
~~~~~^~~~~~~~~~~~~
street_lamps.cpp:175:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d",&l,&r);
~~~~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
247 ms |
1660 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1536 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1280 KB |
Output is correct |
| 4 |
Correct |
2 ms |
384 KB |
Output is correct |
| 5 |
Runtime error |
1249 ms |
524288 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 6 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
896 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
