Submission #837443

#	Time	Username	Problem	Language	Result	Execution time	Memory
837443		_martynas	Rope (JOI17_rope)	C++11	45 / 100	2581 ms	1104 KiB

rope

#include <bits/stdc++.h>

using namespace std;

const int mxn = 1e6+5;

int n, m;
int a[mxn];

int main(int argc, char const *argv[]) {
    cin >> n >> m;
    for(int i = 0; i < n; i++) cin >> a[i];
    for(int i = 1; i <= m; i++) {
        // skip first
        int best = n, curr = 0, mx, j;
        map<int, int> cnt;
        if(a[0] != i) curr++, cnt[a[0]]++;
        for(j = 1; j < n-1; j += 2) {
            if(a[j] != i && a[j+1] != i) {
                cnt[a[j]]++, cnt[a[j+1]]++;
                curr += 2;
            }
            else if(a[j] != i || a[j+1] != i) {
                curr++;
            }
        }
        if(j == n-1) if(a[n-1] != i) curr++, cnt[a[n-1]]++;
        mx = 0;
        for(auto p : cnt) mx = max(mx, p.second);
        curr -= mx;
        best = min(best, curr);
        // pair first
        curr = 0;
        cnt.clear();
        for(j = 0; j < n-1; j += 2) {
            if(a[j] != i && a[j+1] != i) {
                cnt[a[j]]++, cnt[a[j+1]]++;
                curr += 2;
            }
            else if(a[j] != i || a[j+1] != i) {
                curr++;
            }
        }
        if(j == n-1) if(a[n-1] != i) curr++, cnt[a[n-1]]++;
        mx = 0;
        for(auto p : cnt) mx = max(mx, p.second);
        curr -= mx;
        best = min(best, curr);
        cout << best << "\n";
    }
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 20