52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
#include<cstdio>
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#include<cstring>
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#include<algorithm>
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using namespace std;
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#define LL long long
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#define N 50007
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LL c[N], s[N];
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void init() {
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for (LL i = 1; i < N; ++i)
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c[i] = i * (i - 1) >> 1;
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}
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inline int read() {
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int ret = 0;
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char ch = getchar();
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while (!('0' <= ch && ch <= '9'))
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ch = getchar();
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while ('0' <= ch && ch <= '9') {
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ret = ret * 10 + ch - '0';
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ch = getchar();
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}
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return ret;
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}
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int main() {
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init();
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int T = read();
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int n, i;
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LL sum;
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bool flag;
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while (T--) {
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n = read();
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for (i = 0; i < n; ++i)
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s[i] = read();
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sort(s, s + n);
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sum = 0;
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flag = true;
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for (i = 1; i <= n; ++i) {
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sum = sum + s[i - 1];
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if (sum < c[i]) {
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flag = false;
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break;
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}
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}
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if (sum != c[n])
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flag = false;
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if (flag)
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puts("It seems to have no problem.");
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else
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puts("The data have been tampered with!");
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}
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return 0;
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}
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