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27 lines
520 B
C++
27 lines
520 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int n, p;
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string s;
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stack<pair<char, int>> st;
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int main() {
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cin >> n >> p >> s;
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s = ' ' + s;
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for (int i = 1; i < s.size(); i++) {
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if (s[i] == '{') {
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st.push(make_pair(s[i], i));
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} else if (st.top().second == p) {
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cout << i << endl;
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exit(0);
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} else if (i == p) {
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cout << st.top().second << endl;
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exit(0);
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} else {
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st.pop();
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}
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}
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return 0;
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}
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