oj.uz

Submission #47786

# Submission time Handle Problem Language Result Execution time Memory
47786 2018-05-07T08:34:09 Z Talant Security Gate (JOI18_security_gate) C++17
4 / 100
 5000 ms 38348 KB 
#include <bits/stdc++.h>

#define mk make_pair
#define sc second
#define fr first
#define pb emplace_back
#define all(s) s.begin(), s.end()
#define sz(s) ( (int)s.size() )
#define Scan(a) scanf ("%I64d", &a)
#define scan(a) scanf ("%d", &a)
#define int long long

using namespace std;

const int inf = (int)1e9 + 7;
const int N = (int)2e5 + 7;

int n;
int c;
int ans;

string a,b;

struct node {
      int op,cl,cn;
      int _op,_cl,_cn;
      node() {
            op = cl = cn = 0;
            _op = _cl = _cn = 0;
      }
}t[N * 4];

node merge (node a,node b) {
      node c;

      c.cn = (a.cn + b.cn);
      int o = min(a.op,b.cl);
      c.cn += o;
      a.op -= o;
      b.cl -= o;
      c.op = a.op + b.op;
      c.cl = a.cl + b.cl;

      c._cn = (a._cn + b._cn);
      o = min(a._cl,b._op);
      c._cn += o;
      a._cl -= o;
      b._op -= o;
      c._op = a._op + b._op;
      c._cl = a._cl + b._cl;
      return c;
}
void build (int v = 1,int tl = 0,int tr = n - 1) {
      if (tl == tr) {
            if (b[tl] == '(') t[v].op = t[v]._op = 1;
            else t[v].cl = t[v]._cl = 1;
      }
      else {
            int tm = (tl + tr) >> 1;
            build (v + v,tl,tm);
            build (v + v + 1,tm + 1,tr);
            t[v] = merge(t[v + v],t[v + v + 1]);
      }
}
void update (int pos,int x,int v = 1,int tl = 0,int tr = n - 1) {
      if (tl == tr) {
            if (x == 1){
                  t[v].op = 1,t[v].cl = 0;
                  t[v]._op = 1,t[v]._cl = 0;
            }
            else {
                  t[v].cl = 1,t[v].op = 0;
                  t[v]._cl = 1,t[v]._op = 0;
            }
      }
      else {
            int tm = (tl + tr) >> 1;
            if (pos <= tm)
                  update (pos,x,v + v,tl,tm);
            else
                  update (pos,x,v + v + 1,tm + 1,tr);
            t[v] = merge(t[v + v],t[v + v + 1]);
      }
}
node get (int l,int r,int v = 1,int tl = 0,int tr = n - 1) {
      node cur;
      if (l > r || tl > r || tr < l)
            return cur;
      if (l <= tl && tr <= r)
            return t[v];
      int tm = (tl + tr) >> 1;
      return merge(get(l,r,v + v,tl,tm),get(l,r,v + v + 1,tm + 1,tr));
}
vector <int> v;

main () {
      Scan(n);
      cin >> a;

      b = a;

      for (int i = 0; i < a.size(); i ++) {
            if (a[i] == 'x') {
                  v.pb(i);
                  c ++;
                  b[i] = '(';
            }
      }
      if (c > 20 || (n & 1)) {
            cout << 0 << endl;
            return 0;
      }
      build();

      for (int i = 0; i < (1 << c); i ++) {
            for (int j = 0; j < v.size(); j ++) {
                  if (i & (1 << j))
                        update (v[j],1);
                  else
                        update (v[j],2);
            }
            int f = 0;
            for (int ii = 0; ii < n; ii ++) {
                  for (int j = ii - 1; j < n; j ++) {
                        node aa = get(0,ii - 1);
                        node bb = get(ii,j);
                        node cc = get(j + 1,n - 1);
                        node cur;
                        cur.cn = bb._cn;cur.op = bb._cl;cur.cl = bb._op;

                        aa = merge(aa,cur);
                        aa = merge(aa,cc);
                        if (aa.cn == n / 2) {
                              ans ++;
                              ans %= inf;
                              f = 1;
                              break;
                        }
                  }
                  if (f || b[0] == ')')
                        break;
            }
      }
      cout << ans % inf << endl;
}

Compilation message

securitygate.cpp:96:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main () {
       ^
securitygate.cpp: In function 'int main()':
securitygate.cpp:9:35: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
 #define Scan(a) scanf ("%I64d", &a)
                                 ~~^~
 #define scan(a) scanf ("%d", &a)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
 #define int long long
 ~~~~~~~~~~~~~~~~~~~~~~             
 
 ~                                  
 using namespace std;
 ~~~~~~~~~~~~~~~~~~~~~              
 
 ~                                  
 const int inf = (int)1e9 + 7;
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~     
 const int N = (int)2e5 + 7;
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~       
 
 ~                                  
 int n;
 ~~~~~~~                            
 int c;
 ~~~~~~~                            
 int ans;
 ~~~~~~~~~                          
 
 ~                                  
 string a,b;
 ~~~~~~~~~~~~                       
 
 ~                                  
 struct node {
 ~~~~~~~~~~~~~~                     
       int op,cl,cn;
       ~~~~~~~~~~~~~~               
       int _op,_cl,_cn;
       ~~~~~~~~~~~~~~~~~            
       node() {
       ~~~~~~~~~                    
             op = cl = cn = 0;
             ~~~~~~~~~~~~~~~~~~     
             _op = _cl = _cn = 0;
             ~~~~~~~~~~~~~~~~~~~~~  
       }
       ~~                           
 }t[N * 4];
 ~~~~~~~~~~~                        
 
 ~                                  
 node merge (node a,node b) {
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~      
       node c;
       ~~~~~~~~                     
 
 ~                                  
       c.cn = (a.cn + b.cn);
       ~~~~~~~~~~~~~~~~~~~~~~       
       int o = min(a.op,b.cl);
       ~~~~~~~~~~~~~~~~~~~~~~~~     
       c.cn += o;
       ~~~~~~~~~~~                  
       a.op -= o;
       ~~~~~~~~~~~                  
       b.cl -= o;
       ~~~~~~~~~~~                  
       c.op = a.op + b.op;
       ~~~~~~~~~~~~~~~~~~~~         
       c.cl = a.cl + b.cl;
       ~~~~~~~~~~~~~~~~~~~~         
 
 ~                                  
       c._cn = (a._cn + b._cn);
       ~~~~~~~~~~~~~~~~~~~~~~~~~    
       o = min(a._cl,b._op);
       ~~~~~~~~~~~~~~~~~~~~~~       
       c._cn += o;
       ~~~~~~~~~~~~                 
       a._cl -= o;
       ~~~~~~~~~~~~                 
       b._op -= o;
       ~~~~~~~~~~~~                 
       c._op = a._op + b._op;
       ~~~~~~~~~~~~~~~~~~~~~~~      
       c._cl = a._cl + b._cl;
       ~~~~~~~~~~~~~~~~~~~~~~~      
       return c;
       ~~~~~~~~~~                   
 }
 ~~                                 
 void build (int v = 1,int tl = 0,int tr = n - 1) {
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       if (tl == tr) {
       ~~~~~~~~~~~~~~~~             
             if (b[tl] == '(') t[v].op = t[v]._op = 1;
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             else t[v].cl = t[v]._cl = 1;
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       }
       ~~                           
       else {
       ~~~~~~~                      
             int tm = (tl + tr) >> 1;
             ~~~~~~~~~~~~~~~~~~~~~~~~~
             build (v + v,tl,tm);
             ~~~~~~~~~~~~~~~~~~~~~  
             build (v + v + 1,tm + 1,tr);
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             t[v] = merge(t[v + v],t[v + v + 1]);
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       }
       ~~                           
 }
 ~~                                 
 void update (int pos,int x,int v = 1,int tl = 0,int tr = n - 1) {
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       if (tl == tr) {
       ~~~~~~~~~~~~~~~~             
             if (x == 1){
             ~~~~~~~~~~~~~          
                   t[v].op = 1,t[v].cl = 0;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~
                   t[v]._op = 1,t[v]._cl = 0;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
             }
             ~~                     
             else {
             ~~~~~~~                
                   t[v].cl = 1,t[v].op = 0;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~
                   t[v]._cl = 1,t[v]._op = 0;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
             }
             ~~                     
       }
       ~~                           
       else {
       ~~~~~~~                      
             int tm = (tl + tr) >> 1;
             ~~~~~~~~~~~~~~~~~~~~~~~~~
             if (pos <= tm)
             ~~~~~~~~~~~~~~~        
                   update (pos,x,v + v,tl,tm);
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             else
             ~~~~~                  
                   update (pos,x,v + v + 1,tm + 1,tr);
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             t[v] = merge(t[v + v],t[v + v + 1]);
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       }
       ~~                           
 }
 ~~                                 
 node get (int l,int r,int v = 1,int tl = 0,int tr = n - 1) {
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       node cur;
       ~~~~~~~~~~                   
       if (l > r || tl > r || tr < l)
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
             return cur;
             ~~~~~~~~~~~~           
       if (l <= tl && tr <= r)
       ~~~~~~~~~~~~~~~~~~~~~~~~     
             return t[v];
             ~~~~~~~~~~~~~          
       int tm = (tl + tr) >> 1;
       ~~~~~~~~~~~~~~~~~~~~~~~~~    
       return merge(get(l,r,v + v,tl,tm),get(l,r,v + v + 1,tm + 1,tr));
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 }
 ~~                                 
 vector <int> v;
 ~~~~~~~~~~~~~~~~                   
 
 ~                                  
 main () {
 ~~~~~~~~~~                         
       Scan(n);
       ~~~~~~                       
securitygate.cpp:97:7: note: in expansion of macro 'Scan'
       Scan(n);
       ^~~~
securitygate.cpp:102:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for (int i = 0; i < a.size(); i ++) {
                       ~~^~~~~~~~~~
securitygate.cpp:116:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int j = 0; j < v.size(); j ++) {
                             ~~^~~~~~~~~~
securitygate.cpp:9:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define Scan(a) scanf ("%I64d", &a)
                 ~~~~~~^~~~~~~~~~~~~
securitygate.cpp:97:7: note: in expansion of macro 'Scan'
       Scan(n);
       ^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 37880 KB Output is correct
2 Correct 27 ms 37996 KB Output is correct
3 Correct 28 ms 38080 KB Output is correct
4 Correct 27 ms 38080 KB Output is correct
5 Correct 28 ms 38084 KB Output is correct
6 Correct 27 ms 38084 KB Output is correct
7 Correct 27 ms 38088 KB Output is correct
8 Correct 49 ms 38088 KB Output is correct
9 Correct 27 ms 38256 KB Output is correct
10 Correct 29 ms 38256 KB Output is correct
11 Correct 27 ms 38256 KB Output is correct
12 Correct 29 ms 38256 KB Output is correct
13 Correct 40 ms 38348 KB Output is correct
14 Correct 28 ms 38348 KB Output is correct
15 Correct 27 ms 38348 KB Output is correct
16 Correct 28 ms 38348 KB Output is correct
17 Correct 47 ms 38348 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 37880 KB Output is correct
2 Correct 27 ms 37996 KB Output is correct
3 Correct 28 ms 38080 KB Output is correct
4 Correct 27 ms 38080 KB Output is correct
5 Correct 28 ms 38084 KB Output is correct
6 Correct 27 ms 38084 KB Output is correct
7 Correct 27 ms 38088 KB Output is correct
8 Correct 49 ms 38088 KB Output is correct
9 Correct 27 ms 38256 KB Output is correct
10 Correct 29 ms 38256 KB Output is correct
11 Correct 27 ms 38256 KB Output is correct
12 Correct 29 ms 38256 KB Output is correct
13 Correct 40 ms 38348 KB Output is correct
14 Correct 28 ms 38348 KB Output is correct
15 Correct 27 ms 38348 KB Output is correct
16 Correct 28 ms 38348 KB Output is correct
17 Correct 47 ms 38348 KB Output is correct
18 Correct 28 ms 38348 KB Output is correct
19 Correct 683 ms 38348 KB Output is correct
20 Correct 52 ms 38348 KB Output is correct
21 Execution timed out 5039 ms 38348 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 37880 KB Output is correct
2 Correct 27 ms 37996 KB Output is correct
3 Correct 28 ms 38080 KB Output is correct
4 Correct 27 ms 38080 KB Output is correct
5 Correct 28 ms 38084 KB Output is correct
6 Correct 27 ms 38084 KB Output is correct
7 Correct 27 ms 38088 KB Output is correct
8 Correct 49 ms 38088 KB Output is correct
9 Correct 27 ms 38256 KB Output is correct
10 Correct 29 ms 38256 KB Output is correct
11 Correct 27 ms 38256 KB Output is correct
12 Correct 29 ms 38256 KB Output is correct
13 Correct 40 ms 38348 KB Output is correct
14 Correct 28 ms 38348 KB Output is correct
15 Correct 27 ms 38348 KB Output is correct
16 Correct 28 ms 38348 KB Output is correct
17 Correct 47 ms 38348 KB Output is correct
18 Correct 28 ms 38348 KB Output is correct
19 Correct 683 ms 38348 KB Output is correct
20 Correct 52 ms 38348 KB Output is correct
21 Execution timed out 5039 ms 38348 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #4
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 37880 KB Output is correct
2 Correct 27 ms 37996 KB Output is correct
3 Correct 28 ms 38080 KB Output is correct
4 Correct 27 ms 38080 KB Output is correct
5 Correct 28 ms 38084 KB Output is correct
6 Correct 27 ms 38084 KB Output is correct
7 Correct 27 ms 38088 KB Output is correct
8 Correct 49 ms 38088 KB Output is correct
9 Correct 27 ms 38256 KB Output is correct
10 Correct 29 ms 38256 KB Output is correct
11 Correct 27 ms 38256 KB Output is correct
12 Correct 29 ms 38256 KB Output is correct
13 Correct 40 ms 38348 KB Output is correct
14 Correct 28 ms 38348 KB Output is correct
15 Correct 27 ms 38348 KB Output is correct
16 Correct 28 ms 38348 KB Output is correct
17 Correct 47 ms 38348 KB Output is correct
18 Correct 28 ms 38348 KB Output is correct
19 Correct 683 ms 38348 KB Output is correct
20 Correct 52 ms 38348 KB Output is correct
21 Execution timed out 5039 ms 38348 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 37880 KB Output is correct
2 Correct 27 ms 37996 KB Output is correct
3 Correct 28 ms 38080 KB Output is correct
4 Correct 27 ms 38080 KB Output is correct
5 Correct 28 ms 38084 KB Output is correct
6 Correct 27 ms 38084 KB Output is correct
7 Correct 27 ms 38088 KB Output is correct
8 Correct 49 ms 38088 KB Output is correct
9 Correct 27 ms 38256 KB Output is correct
10 Correct 29 ms 38256 KB Output is correct
11 Correct 27 ms 38256 KB Output is correct
12 Correct 29 ms 38256 KB Output is correct
13 Correct 40 ms 38348 KB Output is correct
14 Correct 28 ms 38348 KB Output is correct
15 Correct 27 ms 38348 KB Output is correct
16 Correct 28 ms 38348 KB Output is correct
17 Correct 47 ms 38348 KB Output is correct
18 Correct 28 ms 38348 KB Output is correct
19 Correct 683 ms 38348 KB Output is correct
20 Correct 52 ms 38348 KB Output is correct
21 Execution timed out 5039 ms 38348 KB Time limit exceeded
22 Halted 0 ms 0 KB -