题意:
给出n和q
首先把全部提示的区间都映射到叶子节点上
先把一定不在的问题转成2个一定存在的提示。
那么显然每一个提示里都包括了出口。所以我们查询一下哪个点是被q个区间覆盖了,则这个点就是出口。
#include#include #include #include #include #include
-1 : 1; ret = (c == '-') ? 0 : (c - '0'); while (c = getchar(), c >= '0'&&c <= '9') ret = ret * 10 + (c - '0'); ret *= sgn; return 1; } template <class T> inline void pt(T x) { if (x <0) { putchar('-'); x = -x; } if (x>9) pt(x / 10); putchar(x % 10 + '0'); } typedef long long ll; typedef pair<ll, ll> pii; const int N = 500005; const int inf = 1e9 + 10; int n, q; ll L[55], R[55]; map<ll, int>mp; int main() { L[1] = R[1] = 1; for (int i = 2; i <= 50; i++)L[i] = L[i - 1] << 1, R[i] = R[i - 1] << 1 | 1; rd(n); rd(q); if (q == 0) { if (n == 1)puts("1"); else puts("Data not sufficient!"); return 0; } for (int i = 0, dep, ok; i < q; i++) { ll l, r; rd(dep); rd(l); rd(r); rd(ok); while (dep < n) { l <<= 1; r = r << 1 | 1; dep++; } if (ok)mp[l]++, mp[r + 1]--; else { mp[L[n]]++; mp[l]--; mp[r + 1]++; mp[R[n]+1]--; } } int sum = 0; ll pre = -1, cnt = 0, ans = 0; for (auto i : mp) { sum += i.second; if (pre != -1) { cnt += i.first - pre; ans = pre; } if (sum == q)pre = i.first; else pre = -1; } if (cnt == 0)puts("Game cheated!"); else if (cnt > 1)puts("Data not sufficient!"); else pt(ans); return 0; }