oj.uz

Submission #69544

# Submission time Handle Problem Language Result Execution time Memory
69544 2018-08-21T08:33:24 Z 3zp Election (BOI18_election) C++14
100 / 100
 1747 ms 136324 KB 
#include<bits/stdc++.h>
using namespace std;
struct vale{
    int S, mir, mal, ans;
};
 vale Z,  BL;
vale CO(vale X, vale Y){

    if(X.ans == 1e9) return Y;
    if(Y.ans == 1e9) return X;
    Z.S = X.S+ Y.S;
    Z.mir = min(Y.mir + X.S, X.mir);
    Z.mal = max(X.mal, Y.mal + X.S);
    Z.ans = max(X.ans, Y.ans);
    Z.ans = max(Z.ans, Y.mal + X.S - X.mir);
    return Z;
}
struct NODE{
    vale VAL;
    NODE *L, *R;
    void upd(){
        this->VAL = CO(this->L->VAL, this->R->VAL);
    }
};
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->VAL.S = k;
        x->VAL.mir = min(0, k);
        x->VAL.mal = max(0, k);
        x->VAL.ans = max(k, 0);
    }
    else{
        int mid = (l + r)/2;
        build(x->L, l, mid);
        build(x->R, mid+1, r);
        x->upd();
    }
 }

vale cnt(NODE *&x, int l, int r, int a, int b){

    if(a > r || b < l) { return BL;}
    if(l >= a && r <= b) {return x->VAL;}
    int mid = (l + r)/2;
    return CO(cnt(x->L, l, mid, a ,b),cnt(x->R, mid+1, r, a, b));
}
NODE *rt, *ANS;
main(){
    BL .ans = 1e9;
    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;
        scanf("%d%d",&l,&r);
        vale ANS = cnt(rt, 1, n, l, r);
        printf("%d\n", ANS. ans - ANS.S);
        /*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:51:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
election.cpp: In function 'int main()':
election.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 1; i <= W.size(); i++)
                    ~~^~~~~~~~~~~
election.cpp:66:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&l,&r);
         ~~~~~^~~~~~~~~~~~~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 504 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 5 ms 664 KB Output is correct
4 Correct 4 ms 744 KB Output is correct
5 Correct 5 ms 824 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 504 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 5 ms 664 KB Output is correct
4 Correct 4 ms 744 KB Output is correct
5 Correct 5 ms 824 KB Output is correct
6 Correct 129 ms 7744 KB Output is correct
7 Correct 137 ms 8076 KB Output is correct
8 Correct 115 ms 8980 KB Output is correct
9 Correct 108 ms 9812 KB Output is correct
10 Correct 124 ms 10760 KB Output is correct
11 Correct 143 ms 12148 KB Output is correct
12 Correct 164 ms 12880 KB Output is correct
13 Correct 151 ms 13928 KB Output is correct
14 Correct 154 ms 14888 KB Output is correct
15 Correct 134 ms 15780 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 504 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 5 ms 664 KB Output is correct
4 Correct 4 ms 744 KB Output is correct
5 Correct 5 ms 824 KB Output is correct
6 Correct 129 ms 7744 KB Output is correct
7 Correct 137 ms 8076 KB Output is correct
8 Correct 115 ms 8980 KB Output is correct
9 Correct 108 ms 9812 KB Output is correct
10 Correct 124 ms 10760 KB Output is correct
11 Correct 143 ms 12148 KB Output is correct
12 Correct 164 ms 12880 KB Output is correct
13 Correct 151 ms 13928 KB Output is correct
14 Correct 154 ms 14888 KB Output is correct
15 Correct 134 ms 15780 KB Output is correct
16 Correct 1553 ms 67552 KB Output is correct
17 Correct 1340 ms 75048 KB Output is correct
18 Correct 1326 ms 82420 KB Output is correct
19 Correct 1169 ms 89596 KB Output is correct
20 Correct 1747 ms 96680 KB Output is correct
21 Correct 1441 ms 106156 KB Output is correct
22 Correct 1416 ms 113752 KB Output is correct
23 Correct 1580 ms 121724 KB Output is correct
24 Correct 1403 ms 129208 KB Output is correct
25 Correct 1557 ms 136324 KB Output is correct