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Submission #794286

# Submission time Handle Problem Language Result Execution time Memory
794286 2023-07-26T12:05:44 Z puppy Flip it and Stick it (CCO23_day2problem1) C++17
25 / 25
 6 ms 2216 KB 
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <numeric>
#include <ctime>
#include <cstdlib>
using namespace std;
string s, t;
void flip(string &s)
{
    for (int i = 0; i < (int)s.size(); i++) {
        s[i] = s[i] == '0' ? '1' : '0';
    }
}
int minimum_cost(vector<int> v)
{
    int zr = accumulate(v.begin(), v.end(), 0), on = (int)v.size() - 1;
    if (zr > 2 * (on + 1)) return -1;
    int one = 0, zero = 0;
    vector<int> up;
    for (int i:v) {
        if (i == 1) one++;
        else if (i == 0) zero++;
        else if (i >= 3) up.push_back(i);
    }
    int req_one = 0;
    for (int &i:up) {
        if (i % 2 == 1) {
            req_one++; i--;
        }
    }
    int ans = 0;
    ans += req_one;
    if (one > req_one) {
        one -= req_one;
    }
    else {
        req_one -= one;
        one = 0;
        zero -= (req_one + 1) / 2;
    }
    int req_ev = 0;
    for (int i:up) req_ev += (i - 2) / 2;
    if (req_ev <= zero) {
        ans += req_ev;
    }
    else {
        ans += zero; req_ev -= zero;
        ans += req_ev * 2;
    }
    return ans;
}
int main()
{
    cin >> s >> t;
    int n = s.size();
    int k = t.size();
    if (k == 1) {
        bool ouc[2];
        for (int i = 0; i < n; i++) ouc[s[i]-'0'] = true;
        if (ouc[t[0]-'0']) cout << -1;
        else cout << 0;
    }
    else if (k == 2) {
        if (t[0] != t[1]) {
            if (t[0] == '1') flip(s);
            int ans = 0;
            for (int i = n - 1; i >= 0; i--) {
                if (s[i] == '1') continue;
                while (i > 0 && s[i-1] == '0') --i;
                ans++;
            }
            if (s[n-1] == '0') --ans;
            cout << ans;
        }
        else {
            if (t[0] == '1') flip(s);
            int ans = 0;
            int cnt = 0;
            for (int i = 0; i < n; i++) cnt += s[i] == '0';
            if (cnt > (n+1)/2) cout << -1;
            else {
                for (int i = 0; i < n; i++) {
                    if (s[i] == '1') continue;
                    int l = i;
                    while (i + 1 < n && s[i] == s[i+1]) i++;
                    int r = i;
                    ans += r - l;
                }
                cout << ans;
            }
        }
    }
    else {
        if (t[0] != t[2]) {
            if (t[0] == '1') {
                flip(s); flip(t);
            }
            if (t[1] == '1') {
                t[1] = '0';
                flip(s);
                reverse(s.begin(), s.end());
            }
            int cnt = 0;
            int st = n - 1;
            while (st >= 0 && s[st] == '0') st--;
            for (int i = st; i >= 0; i--) {
                if (s[i] == '1') continue;
                int l = i;
                while (i > 0 && s[i-1] == '0') i--;
                int r = i;
                cnt += l - r >= 1;
            }
            cout << cnt;
        }
        else if (t[0] != t[1]) {
            if (t[0] == '1') flip(s);
            int cnt = 0;
            for (int i = 1; i < n - 1; i++) {
                if (s[i-1] == '0' && s[i] == '1' && s[i+1] == '0') cnt++;
            }
            cout << (cnt + 1) / 2;
        }
        else {
            if (t[0] == '1') flip(s);
            vector<int> v;
            for (int i = 0; i < n; i++) {
                if (s[i] == '1') continue;
                int l = i;
                while (i < n - 1 && s[i+1] == '0') i++;
                int r = i;
                v.push_back(r - l + 1);
            }
            for (int i = 0; i < n - 1; i++) {
                if (s[i] == '1' && s[i+1] == '1') v.push_back(0);
            }
            if (s[0] == '1') v.push_back(0);
            if (s[n-1] == '1') v.push_back(0);
            cout << minimum_cost(v);
        }
    }
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 612 KB Output is correct
4 Correct 3 ms 612 KB Output is correct
5 Correct 5 ms 612 KB Output is correct
6 Correct 3 ms 628 KB Output is correct
7 Correct 4 ms 672 KB Output is correct

Subtask #2
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 4 ms 612 KB Output is correct
7 Correct 4 ms 612 KB Output is correct
8 Correct 4 ms 612 KB Output is correct
9 Correct 5 ms 592 KB Output is correct
10 Correct 5 ms 616 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 4 ms 612 KB Output is correct
7 Correct 4 ms 612 KB Output is correct
8 Correct 4 ms 612 KB Output is correct
9 Correct 5 ms 592 KB Output is correct
10 Correct 5 ms 616 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 4 ms 656 KB Output is correct
21 Correct 4 ms 608 KB Output is correct
22 Correct 4 ms 612 KB Output is correct
23 Correct 4 ms 612 KB Output is correct
24 Correct 4 ms 604 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 4 ms 612 KB Output is correct
27 Correct 6 ms 724 KB Output is correct
28 Correct 4 ms 652 KB Output is correct
29 Correct 4 ms 636 KB Output is correct
30 Correct 4 ms 660 KB Output is correct
31 Correct 4 ms 612 KB Output is correct
32 Correct 4 ms 612 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 4 ms 636 KB Output is correct
8 Correct 4 ms 612 KB Output is correct
9 Correct 5 ms 604 KB Output is correct
10 Correct 4 ms 612 KB Output is correct
11 Correct 4 ms 652 KB Output is correct
12 Correct 4 ms 612 KB Output is correct
13 Correct 4 ms 636 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 300 KB Output is correct
10 Correct 4 ms 596 KB Output is correct
11 Correct 4 ms 612 KB Output is correct
12 Correct 5 ms 596 KB Output is correct
13 Correct 4 ms 612 KB Output is correct
14 Correct 5 ms 624 KB Output is correct
15 Correct 4 ms 612 KB Output is correct
16 Correct 4 ms 612 KB Output is correct
17 Correct 4 ms 612 KB Output is correct
18 Correct 3 ms 612 KB Output is correct
19 Correct 6 ms 612 KB Output is correct
20 Correct 4 ms 608 KB Output is correct
21 Correct 4 ms 600 KB Output is correct
22 Correct 4 ms 612 KB Output is correct

Subtask #6
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 4 ms 636 KB Output is correct
8 Correct 4 ms 612 KB Output is correct
9 Correct 5 ms 604 KB Output is correct
10 Correct 4 ms 612 KB Output is correct
11 Correct 4 ms 652 KB Output is correct
12 Correct 4 ms 612 KB Output is correct
13 Correct 4 ms 636 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 304 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 300 KB Output is correct
23 Correct 4 ms 596 KB Output is correct
24 Correct 4 ms 612 KB Output is correct
25 Correct 5 ms 596 KB Output is correct
26 Correct 4 ms 612 KB Output is correct
27 Correct 5 ms 624 KB Output is correct
28 Correct 4 ms 612 KB Output is correct
29 Correct 4 ms 612 KB Output is correct
30 Correct 4 ms 612 KB Output is correct
31 Correct 3 ms 612 KB Output is correct
32 Correct 6 ms 612 KB Output is correct
33 Correct 4 ms 608 KB Output is correct
34 Correct 4 ms 600 KB Output is correct
35 Correct 4 ms 612 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 5 ms 2216 KB Output is correct
39 Correct 6 ms 1200 KB Output is correct
40 Correct 5 ms 1068 KB Output is correct
41 Correct 5 ms 1120 KB Output is correct
42 Correct 5 ms 1072 KB Output is correct
43 Correct 4 ms 1176 KB Output is correct
44 Correct 4 ms 1368 KB Output is correct
45 Correct 5 ms 1116 KB Output is correct
46 Correct 6 ms 1480 KB Output is correct
47 Correct 4 ms 1244 KB Output is correct
48 Correct 5 ms 1120 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 296 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 0 ms 300 KB Output is correct
53 Correct 0 ms 212 KB Output is correct
54 Correct 4 ms 612 KB Output is correct
55 Correct 4 ms 676 KB Output is correct
56 Correct 5 ms 628 KB Output is correct
57 Correct 4 ms 612 KB Output is correct
58 Correct 4 ms 612 KB Output is correct
59 Correct 4 ms 612 KB Output is correct
60 Correct 4 ms 584 KB Output is correct
61 Correct 0 ms 212 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 0 ms 212 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 4 ms 656 KB Output is correct
66 Correct 5 ms 648 KB Output is correct
67 Correct 4 ms 624 KB Output is correct
68 Correct 4 ms 676 KB Output is correct
69 Correct 4 ms 596 KB Output is correct
70 Correct 5 ms 676 KB Output is correct
71 Correct 5 ms 708 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 0 ms 212 KB Output is correct