30 lines
602 B
C++
30 lines
602 B
C++
#include <bits/stdc++.h>
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using namespace std;
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const int N = 200003;
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const int INF = 0x3f3f3f3f;
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int h[N];
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int find(int x) {
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int k = (x % N + N) % N;
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while (h[k] != INF && h[k] != x) {
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k++;
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if (k == N) k = 0;
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}
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return k;
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}
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int main() {
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int n;
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cin >> n;
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memset(h, 0x3f, sizeof h);
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while (n--) {
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string op;
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int x;
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cin >> op >> x;
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int k = find(x);
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if (op == "I")h[k] = x;
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else {
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if (h[k] != INF) puts("Yes");
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else puts("No");
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}
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}
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return 0;
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} |