oj.uz

Submission #1021176

# Submission time Handle Problem Language Result Execution time Memory
1021176 2024-07-12T15:08:29 Z PieArmy Election (BOI18_election) C++17
100 / 100
 324 ms 46240 KB 
typedef long long ll;
ll pie(ll army){return (1ll<<army);}
#include <bits/stdc++.h>
#define fr first
#define sc second
#define pb push_back
#define endl '\n'
#define mid ((left+right)>>1)
const ll inf=2000000000000000005;
const int sonsuz=2000000005;
using namespace std;
ll fpow(ll x,ll y,ll m=0){if(y<0){cout<<"powError";return -1;}if(m)x%=m;ll res=1;while(y>0){if(y&1)res*=x;x*=x;if(m){x%=m;res%=m;}y>>=1;}return res;}

struct Node{
    int sum=0,pref=0,suf=0,ans=0;
};

struct Seg{
    int n;
    vector<Node>tree;
    vector<int>arr;
    Node comb(Node x,Node y){
        Node res;
        res.sum=x.sum+y.sum;
        res.pref=max(x.pref,x.sum+y.pref);
        res.suf=max(x.suf+y.sum,y.suf);
        res.ans=max(max(x.ans+y.sum,x.sum+y.ans),x.pref+y.suf);
        return res;
    }
    void build(int node=1,int left=0,int right=-1){
        if(right==-1)right=n-1;
        if(left==right){
            tree[node].sum=arr[left];
            tree[node].pref=max(arr[left],0);
            tree[node].suf=max(arr[left],0);
            tree[node].ans=max(arr[left],0);
            return;
        }
        build(node*2,left,mid);build(node*2+1,mid+1,right);
        tree[node]=comb(tree[node*2],tree[node*2+1]);
    }
    Seg(vector<int>v){
        n=v.size();
        arr=v;
        tree.resize(n<<2);
        build();
    }
    int l,r;
    Node qu(int node=1,int left=0,int right=-1){
        if(right==-1)right=n-1;
        Node res;
        if(left>r||right<l)return res;
        if(left>=l&&right<=r)return tree[node]; 
        res=comb(qu(node*2,left,mid),qu(node*2+1,mid+1,right));
        return res;
    }
    int query(int lef,int rig){
        l=lef;r=rig;
        return qu().ans;
    }
};

void code(){
	int n;cin>>n;
    vector<int>v;
    for(int i=0;i<n;i++){
        char c;cin>>c;
        v.pb(c=='T'?1:-1);
    }
    Seg seg(v);
    int q;cin>>q;
    while(q--){
        int l,r;cin>>l>>r;
        cout<<seg.query(l-1,r-1)<<endl;
    }
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);
	bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
	int t=1;
	if(!t)cin>>t;
	while(t--){code();cout<<endl;}
    return 0;
}

Compilation message

election.cpp: In function 'int main()':
election.cpp:80:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |  bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~
election.cpp:80:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |  bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 620 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 34 ms 6588 KB Output is correct
7 Correct 33 ms 6596 KB Output is correct
8 Correct 33 ms 6600 KB Output is correct
9 Correct 30 ms 6652 KB Output is correct
10 Correct 35 ms 6508 KB Output is correct
11 Correct 37 ms 6556 KB Output is correct
12 Correct 42 ms 6588 KB Output is correct
13 Correct 35 ms 6752 KB Output is correct
14 Correct 34 ms 6600 KB Output is correct
15 Correct 36 ms 6684 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 34 ms 6588 KB Output is correct
7 Correct 33 ms 6596 KB Output is correct
8 Correct 33 ms 6600 KB Output is correct
9 Correct 30 ms 6652 KB Output is correct
10 Correct 35 ms 6508 KB Output is correct
11 Correct 37 ms 6556 KB Output is correct
12 Correct 42 ms 6588 KB Output is correct
13 Correct 35 ms 6752 KB Output is correct
14 Correct 34 ms 6600 KB Output is correct
15 Correct 36 ms 6684 KB Output is correct
16 Correct 303 ms 45224 KB Output is correct
17 Correct 279 ms 44924 KB Output is correct
18 Correct 290 ms 45188 KB Output is correct
19 Correct 247 ms 44580 KB Output is correct
20 Correct 311 ms 44452 KB Output is correct
21 Correct 318 ms 46192 KB Output is correct
22 Correct 313 ms 46220 KB Output is correct
23 Correct 324 ms 46240 KB Output is correct
24 Correct 303 ms 45912 KB Output is correct
25 Correct 311 ms 45604 KB Output is correct