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【美团杯2020】A.查查查乐乐

题目链接

参考博客

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//2021-05-27 15:49:25
#include <bits/stdc++.h>
using namespace std;

const int N = 1001;

int T;
string s;
int hzl[N];
int hzx[N];

int main() {
cin >> T;
while (T--) {
cin >> s;
memset(hzl, 0, sizeof(hzl));
memset(hzx, 0, sizeof(hzx));
for (int i = s.size()-1; i >= 0; i--) {
hzl[i] = hzl[i+1] + (s[i] == 'l');
hzx[i] = hzx[i+1] + (s[i] == 'x');
}
int cnt = 0, pre = 0;
int ans = 1e9+7;
for (int i = 0; i < s.size(); i++) {
if (s[i] == 'l') {
continue;
}
cnt++;
if (cnt == 3) {
if(hzl[i] <= 1) {
ans = min(ans, pre);
break;
} else {
ans = min(ans, pre+hzl[i]-1);
ans = min(ans, pre+hzx[i]);
}
cnt--;
pre++;
}
}
if (ans == 1e9+7) {
ans = 0;
}
cout << ans << endl;
}

return 0;
}


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