Submission #1092571

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092571		Sunbae	Growing Trees (BOI11_grow)	C++17	0 / 100	88 ms	4256 KiB

grow

#include <bits/stdc++.h>
#define z exit(0)
typedef long long ll;
using namespace std;
const int N = 1e5 + 5;
pair<int,int> to_upd[2];
ll bit[N], a[N];
void upd(int i, ll v){ for(; i<N; i+=i&-i) bit[i] += v;}
int qry(int i){ ll r = 0; for(; i; i-=i&-i) r += bit[i]; return r;}
void UPD(int l, int r){ upd(l, +1); upd(r+1, -1);}
ll A(int i){ return a[i] + qry(i);}
signed main(){
	int n, q; scanf("%d %d", &n, &q);
	for(int i = 1; i<=n; ++i) scanf("%lld", a+i);
	sort(a+1, a+1+n);
	for(int i = 0, c, h, l, r, L, R, sz; i<q; ++i){
		char op; scanf(" %c", &op);
		if(op == 'F'){
			scanf("%d %d", &c, &h);
			int low = 1, high = n, st = n+1, ed = -1;
			while(low <= high){
				int mid = low + ((high-low)>>1);
				if(A(mid) >= h) high = mid-1, st = mid;
				else low = mid+1;
			}
			if(st > n) continue;
			ed = min(n, st+c-1);
			ll val = A(ed);
			low = 1; high = ed; l = n+1; r = -1;
			while(low <= high){
				int mid = low + ((high-low)>>1);
				if(A(mid) < val) low = mid+1;
				else if(A(mid) == val) high = mid-1, l = mid;
			}
			low = ed; high = n;
			while(low <= high){
				int mid = low + ((high-low)>>1);
				if(A(mid) > val) high = mid-1;
				else if(A(mid) == val) low = mid+1, r = mid;
			}
			if(l > r) continue;
			L = st; R = l-1; sz = 0;
			if(L <= R) to_upd[sz++] = {L, R};
			int rem = c-l+st;
			L = r - rem + 1; R = r;
			if(L <= R) to_upd[sz++] = {L, R};
			sort(to_upd, to_upd+sz); sz = unique(to_upd, to_upd+sz) - to_upd;
			for(int j = 0; j<sz; ++j) UPD(to_upd[j].first, to_upd[j].second);
		}else{
			scanf("%d %d", &l, &r);
			int low = 1, high = n; L = n+1; R = -1;
			while(low <= high){
				int mid = low + ((high-low)>>1);
				if(A(mid) >= l) high = mid-1, L = mid;
				else low = mid+1;
			}
			low = 1; high = n;
			while(low <= high){
				int mid = low + ((high-low)>>1);
				if(A(mid) <= r) low = mid+1, R = mid;
				else high = mid-1;
			}
			if(L <= n && R >= 1 && L <= R) printf("%d\n", R-L+1);
			else puts("0");
		}
	}
}

Compilation message (stderr)

grow.cpp: In function 'int main()':
grow.cpp:13:17: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  int n, q; scanf("%d %d", &n, &q);
      |            ~~~~~^~~~~~~~~~~~~~~~~
grow.cpp:14:33: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  for(int i = 1; i<=n; ++i) scanf("%lld", a+i);
      |                            ~~~~~^~~~~~~~~~~~~
grow.cpp:17:17: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   char op; scanf(" %c", &op);
      |            ~~~~~^~~~~~~~~~~~
grow.cpp:19:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |    scanf("%d %d", &c, &h);
      |    ~~~~~^~~~~~~~~~~~~~~~~
grow.cpp:50:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |    scanf("%d %d", &l, &r);
      |    ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10