C. Good String

最新推荐文章于 2025-02-08 09:11:45 发布

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http://codeforces.com/contest/1165/problem/C

#include<bits/stdc++.h>
using namespace std;
const int N=200200;
int i,j=1,l,k;
char c1[N],c[N];
int main() {
    scanf("%d", &l);
    scanf("%s", c);
    while (j < l) {
        if (c[i] != c[j]) {
            c1[k++] = c[i];
            c1[k++] = c[j];
            i = j + 1;
            j = j + 2;
        } else {
            j++;
        }
    }
    cout << l - k << endl;
    for (int i = 0; i < k; i++) {
        cout << c1[i];
    }
    cout << endl;
}