oj.uz

Submission #69532

# Submission time Handle Problem Language Result Execution time Memory
69532 2018-08-21T08:10:31 Z 3zp Election (BOI18_election) C++14
82 / 100
 1890 ms 263168 KB 
#include<bits/stdc++.h>
using namespace std;
struct NODE{
    int S, mir, mal, mar, ans;
    NODE *L, *R;
    void CO(NODE *&X, NODE *&Y){
        if(!X && !Y) return;
        if(!X) {
            this -> S = Y -> S;
            this -> mir = Y -> mir;
            this -> mal = Y -> mal;
            this -> mar = Y -> mar;
            this -> ans = Y -> ans;
            return;
        }
        if(!Y){
            this -> S = X -> S;
            this -> mir = X -> mir;
            this -> mal = X -> mal;
            this -> mar = X -> mar;
            this -> ans = X -> ans;
            return;
        }
        this->S = X->S+ Y->S;
        this->mir = min(Y->mir + X->S, X->mir);
        this->mal = max(X->mal, Y->mal + X->S);
        this->mar = Y->mar + X->S;
        this->ans = max(X->ans, Y->ans);
        this->ans = max(this->ans, Y->mal + X->S - X->mir);

    }
    void upd(){
        this->CO(this->L, this->R);
    }
};
int s[500009];
void build(NODE *&x, int l, int r){
    x = new NODE();
    if(l == r){
        int k =  s[l] - s[l-1];
        x->S = k;
        x->mir = min(0, k);
        x->mal = max(0, k);
        x->mar = k;
        x->ans = max(k, 0);
    }
    else{
        int mid = (l + r)/2;
        build(x->L, l, mid);
        build(x->R, mid+1, r);
        x->upd();
    }
 }
void cnt(NODE *&x, NODE *&ans, int l, int r, int a, int b){
    if(a > r || b < l) return;
    if(l >= a && r <= b) {ans = x; return;}
    int mid = (l + r)/2;
    NODE *ans1 = NULL, *ans2 = NULL;
    cnt(x->L, ans1, l, mid, a ,b);
    cnt(x->R, ans2, mid+1, r, a, b);
    ans = new NODE();
    ans->CO(ans1, ans2);
}
NODE *rt, *ANS;
main(){
    int n;
    cin >> n;
    string W;
    cin >> W;
    for(int i = 1; i <= W.size(); i++)
        if(W[i-1] == 'C') s[i] = s[i-1]+1;
    else s[i] =  s[i-1] - 1;

    build(rt,1,n);
    int q;
    cin >> q;
    while(q--){
        int l, r;
        cin>>l>>r;
        cnt(rt, ANS, 1, n, l, r);
        cout << ANS-> ans - ANS->S << endl;
        /*int S = 0;
        int M = 0;
        for(int i = l - 1; i <= r; i++){
            if(s[i] + S < s[l - 1]){
                S++;
                M = max(0, M-1);
            }
            if(s[i] > s[r]){
                M = max(M, s[i] - s[r]);
            }

        }
        cout << S + M << endl;*/

    }

}

Compilation message

election.cpp:65:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
election.cpp: In function 'int main()':
election.cpp:70:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 1; i <= W.size(); i++)
                    ~~^~~~~~~~~~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 2168 KB Output is correct
2 Correct 10 ms 2276 KB Output is correct
3 Correct 12 ms 2368 KB Output is correct
4 Correct 9 ms 2368 KB Output is correct
5 Correct 9 ms 2368 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 2168 KB Output is correct
2 Correct 10 ms 2276 KB Output is correct
3 Correct 12 ms 2368 KB Output is correct
4 Correct 9 ms 2368 KB Output is correct
5 Correct 9 ms 2368 KB Output is correct
6 Correct 448 ms 98436 KB Output is correct
7 Correct 371 ms 104304 KB Output is correct
8 Correct 471 ms 104304 KB Output is correct
9 Correct 341 ms 104304 KB Output is correct
10 Correct 380 ms 104304 KB Output is correct
11 Correct 486 ms 104304 KB Output is correct
12 Correct 395 ms 104304 KB Output is correct
13 Correct 503 ms 104712 KB Output is correct
14 Correct 497 ms 105644 KB Output is correct
15 Correct 402 ms 106664 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 2168 KB Output is correct
2 Correct 10 ms 2276 KB Output is correct
3 Correct 12 ms 2368 KB Output is correct
4 Correct 9 ms 2368 KB Output is correct
5 Correct 9 ms 2368 KB Output is correct
6 Correct 448 ms 98436 KB Output is correct
7 Correct 371 ms 104304 KB Output is correct
8 Correct 471 ms 104304 KB Output is correct
9 Correct 341 ms 104304 KB Output is correct
10 Correct 380 ms 104304 KB Output is correct
11 Correct 486 ms 104304 KB Output is correct
12 Correct 395 ms 104304 KB Output is correct
13 Correct 503 ms 104712 KB Output is correct
14 Correct 497 ms 105644 KB Output is correct
15 Correct 402 ms 106664 KB Output is correct
16 Runtime error 1890 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
17 Halted 0 ms 0 KB -