oj.uz

Submission #86835

# Submission time Handle Problem Language Result Execution time Memory
86835 2018-11-27T17:21:00 Z Mercenary Election (BOI18_election) C++11
100 / 100
 847 ms 121624 KB 
#include<bits/stdc++.h>

using namespace std;
#define brokenheart "TEST"
#define pb	push_back
typedef long double ld;
typedef long long ll;
const int maxn = 5e5 + 5;

int n , q;
string s;

namespace IT
{
    const int cant = 1e9;
    struct TNode
    {
        int dep , suf;
        TNode(int _x , int _y) : dep(_x) , suf (_y) {};
        TNode (char x){dep = suf = (x == 'C' ? 1 : -1);}
        TNode(){};
        TNode operator + (const TNode & other) const &
        {
            if(suf == cant)return other;
            if(other.suf == cant)return (*this);
            TNode res;
            res.dep = dep + other.dep;
            res.suf = min(other.suf,other.dep+suf);
            return res;
        }
    }a[maxn * 4];

    TNode query(int x , int l , int r , int L , int R)
    {
        if(l > R || L > r)return TNode(cant,cant);
        if(L <= l && r <= R)return a[x];
        int mid = l + r >> 1;
        return query(x * 2 , l , mid , L , R) + query(x * 2 + 1 , mid + 1 , r , L , R);
    }

    TNode query(int l , int h){return query(1,1,n,l,h);};

    void update(int x , int l , int r , int pos , int val)
    {
        if(l == r)
        {
            a[x] = TNode(val,val);
            return;
        }
        int mid = l + r >> 1;
        if(mid >= pos)update(x * 2 , l , mid , pos , val);
        else update(x * 2 + 1 , mid + 1 , r , pos , val);
        a[x] = a[x * 2] + a[x * 2 + 1];
    }

    void update(int pos , int val){update(1,1,n,pos,val);}

    void build(int x , int l , int h)
    {
        if(l == h)
        {
            a[x] = TNode(s[l]);
            return;
        }
        int mid = l + h >> 1;
        build(x * 2 , l , mid);
        build(x * 2 + 1 , mid + 1 , h);
        a[x] = a[x * 2] + a[x * 2 + 1];
    }

    void build()
    {
        s = " " + s;
        build(1 , 1 , n);
    }
}

struct TQuery
{
    int h , id;
};

int res[maxn];
vector<TQuery> Vq[maxn];

vector<int> del;

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	if(fopen(brokenheart".INP","r"))
        freopen(brokenheart".INP", "r",stdin) ,
        freopen(brokenheart".OUT", "w",stdout);
    cin >> n >> s;
    IT::build();
    cin >> q;
    for(int i = 1 ; i <= q ; ++i)
    {
        int l , h;cin >> l >> h;
        Vq[l].pb({h , i});
    }
    for(int i = n ; i >= 1 ; --i)
    {
        if(s[i] == 'T')
        {
            IT::update(i,0);
            del.push_back(i);
        }
        else
        {
            if(!del.empty())
            {
                IT::update(del.back(),-1);
                del.pop_back();
            }
        }
        for(auto q : Vq[i])
        {
            res[q.id] = (upper_bound(del.rbegin(),del.rend(),q.h) - del.rbegin())
                - min(IT::query(i,q.h).suf,0);
//            cout << q.id << " " << IT::query(i,q.h).suf << '\n';
        }
    }
    for(int i = 1 ; i <= q ; ++i)cout << res[i] << '\n';
}

Compilation message

election.cpp: In function 'IT::TNode IT::query(int, int, int, int, int)':
election.cpp:37:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = l + r >> 1;
                   ~~^~~
election.cpp: In function 'void IT::update(int, int, int, int, int)':
election.cpp:50:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = l + r >> 1;
                   ~~^~~
election.cpp: In function 'void IT::build(int, int, int)':
election.cpp:65:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         int mid = l + h >> 1;
                   ~~^~~
election.cpp: In function 'int main()':
election.cpp:93:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(brokenheart".INP", "r",stdin) ,
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
         freopen(brokenheart".OUT", "w",stdout);
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
election.cpp:93:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 12152 KB Output is correct
2 Correct 19 ms 12416 KB Output is correct
3 Correct 15 ms 12508 KB Output is correct
4 Correct 19 ms 12508 KB Output is correct
5 Correct 15 ms 12508 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 12152 KB Output is correct
2 Correct 19 ms 12416 KB Output is correct
3 Correct 15 ms 12508 KB Output is correct
4 Correct 19 ms 12508 KB Output is correct
5 Correct 15 ms 12508 KB Output is correct
6 Correct 98 ms 17520 KB Output is correct
7 Correct 112 ms 17896 KB Output is correct
8 Correct 114 ms 18928 KB Output is correct
9 Correct 97 ms 20172 KB Output is correct
10 Correct 88 ms 21116 KB Output is correct
11 Correct 100 ms 22452 KB Output is correct
12 Correct 89 ms 23300 KB Output is correct
13 Correct 96 ms 24472 KB Output is correct
14 Correct 90 ms 25164 KB Output is correct
15 Correct 79 ms 25984 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 12152 KB Output is correct
2 Correct 19 ms 12416 KB Output is correct
3 Correct 15 ms 12508 KB Output is correct
4 Correct 19 ms 12508 KB Output is correct
5 Correct 15 ms 12508 KB Output is correct
6 Correct 98 ms 17520 KB Output is correct
7 Correct 112 ms 17896 KB Output is correct
8 Correct 114 ms 18928 KB Output is correct
9 Correct 97 ms 20172 KB Output is correct
10 Correct 88 ms 21116 KB Output is correct
11 Correct 100 ms 22452 KB Output is correct
12 Correct 89 ms 23300 KB Output is correct
13 Correct 96 ms 24472 KB Output is correct
14 Correct 90 ms 25164 KB Output is correct
15 Correct 79 ms 25984 KB Output is correct
16 Correct 769 ms 52856 KB Output is correct
17 Correct 599 ms 56576 KB Output is correct
18 Correct 678 ms 64892 KB Output is correct
19 Correct 664 ms 74068 KB Output is correct
20 Correct 739 ms 81852 KB Output is correct
21 Correct 847 ms 92336 KB Output is correct
22 Correct 733 ms 99180 KB Output is correct
23 Correct 787 ms 107952 KB Output is correct
24 Correct 708 ms 115196 KB Output is correct
25 Correct 691 ms 121624 KB Output is correct