oj.uz

Submission #27401

# Submission time Handle Problem Language Result Execution time Memory
27401 2017-07-12T11:58:58 Z tlwpdus Ruka (COI15_ruka) C++11
100 / 100
 1186 ms 9332 KB 
#include <bits/stdc++.h>
using namespace std;

int n, m, MAXN = 1e8+2, bia = 5e7+1;
struct BIT {
	unordered_map<int,int> bit;
	void upd(int idx, int val) {
		idx += bia;
		while(idx<=MAXN) {
			if (bit.find(idx)==bit.end()) bit[idx] = val;
			else bit.find(idx)->second += val;
			idx += idx&(-idx);
		}
	}
	int getv(int idx) {
		int res = 0;
		idx += bia;
		while(idx>0) {
			res += (bit.find(idx)==bit.end())?0:bit[idx];
			idx -= idx&(-idx);
		}
		return res;
	}
};

struct bs {
	BIT bitu, bitd;
	int arr[100100];
	int cur, sum, b;
	bs() {cur=b=0;sum=1;}
	void init() {
		int i, res = 1+arr[0];
		for (i=1;i<n;i++) {
			int p = res, q = res+arr[i];
			if (p>q) swap(p,q);
			bitd.upd(p,1);
			bitd.upd(q,-1);
			res += arr[i];
		}
	}
	void B() {
		if (!cur) return;
		int p = sum+b, q = sum+arr[cur]+b;
		if (p>q) swap(p,q);
		bitd.upd(p,1); bitd.upd(q,-1);
		cur--; sum -= arr[cur];
		p = sum; q = sum+arr[cur];
		if (p>q) swap(p,q);
		bitu.upd(p,-1); bitu.upd(q,1);
	}
	void F() {
		if (cur==n-1) return;
		int p = sum, q = sum+arr[cur];
		if (p>q) swap(p,q);
		bitu.upd(p,1); bitu.upd(q,-1);
		sum += arr[cur]; cur++;
		p = sum+b; q = sum+arr[cur]+b;
		if (p>q) swap(p,q);
		bitd.upd(p,-1); bitd.upd(q,1);
	}
	int Q() {
		return bitu.getv(0)+bitd.getv(b)+(1LL*sum*(sum+arr[cur])<0);
	}
	void C(int nx) {
		b += arr[cur]-nx;
		arr[cur] = nx;
	}
} x, y;

int main(){
	int i;

	scanf("%d",&n);
	for (i=0;i<n;i++) scanf("%d%d",&x.arr[i],&y.arr[i]);
	x.init(); y.init();
	scanf("%d",&m);
	for (i=0;i<m;i++) {
		char ch;
		scanf(" %c",&ch);
		if (ch=='B') {
			x.B(); y.B();
		}
		else if (ch=='F') {
			x.F(); y.F();
		}
		else if (ch=='Q') {
			printf("%d\n",x.Q()+y.Q());
		}
		else {
			int a, b;
			scanf("%d%d",&a,&b);
			x.C(a); y.C(b);
		}
	}

	return 0;
}

Compilation message

ruka.cpp: In function 'int main()':
ruka.cpp:73:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
ruka.cpp:74:53: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (i=0;i<n;i++) scanf("%d%d",&x.arr[i],&y.arr[i]);
                                                     ^
ruka.cpp:76:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&m);
                ^
ruka.cpp:79:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %c",&ch);
                   ^
ruka.cpp:91:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d",&a,&b);
                       ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2940 KB Output is correct
2 Correct 3 ms 2940 KB Output is correct
3 Correct 3 ms 2940 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2940 KB Output is correct
2 Correct 3 ms 2940 KB Output is correct
3 Correct 3 ms 2940 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct
5 Correct 333 ms 5300 KB Output is correct
6 Correct 269 ms 4736 KB Output is correct
7 Correct 229 ms 3760 KB Output is correct
8 Correct 213 ms 3784 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2940 KB Output is correct
2 Correct 3 ms 2940 KB Output is correct
3 Correct 3 ms 2940 KB Output is correct
4 Correct 3 ms 2808 KB Output is correct
5 Correct 333 ms 5300 KB Output is correct
6 Correct 269 ms 4736 KB Output is correct
7 Correct 229 ms 3760 KB Output is correct
8 Correct 213 ms 3784 KB Output is correct
9 Correct 846 ms 8756 KB Output is correct
10 Correct 1186 ms 9332 KB Output is correct
11 Correct 843 ms 7516 KB Output is correct
12 Correct 679 ms 7116 KB Output is correct