oj.uz

Submission #89957

# Submission time Handle Problem Language Result Execution time Memory
89957 2018-12-19T08:35:56 Z Good Election (BOI18_election) C++11
100 / 100
 952 ms 121836 KB 
/*
ID: blackha5
TASK: test
LANG: C++
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define ff first
#define ss second
#define Maxn 500003
#define ll long long
#define pb push_back
#define Inf 1000000009
#define ppb() pop_back()
#define pii pair <int , int>
#define mid(x, y) (x + y) / 2
#define all(x) x.begin(),x.end()
#define llInf 1000000000000000009
#define tr(i, c) for(__typeof(c).begin() i = (c).begin() ; i != (c).end() ; i++)
using namespace std;
using namespace __gnu_pbds;
typedef tree <int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update> order;

int n, q;
char a[Maxn];
int ans[Maxn];
int T[Maxn * 4][2];

vector <int> v, B;
vector <pii> A[Maxn];

void upd (int x, int y, int l, int r, int v) {
	if (l == r) {
		T[v][0] = y;
		T[v][1] = min (y, 0);
		return;
	}
	
	if (x <= mid (l, r))
		upd (x, y, l, mid (l, r), v * 2);
	else
		upd (x, y, mid (l, r) + 1, r, v * 2 + 1);
	
	T[v][0] = T[v * 2][0] + T[v * 2 + 1][0];
	T[v][1] = min (0, min (T[v * 2 + 1][1], T[v * 2][1] + T[v * 2 + 1][0]));		
}

void get (int x, int y, int l, int r, int v) {
	if (l >= x and r <= y) {
		B.pb (v);
		return;
	}	
	
	if (l > y or r < x)
		return;		
	
	get (x, y, l, mid (l, r), v * 2);
	get (x, y, mid (l, r) + 1, r, v * 2 + 1);		
}

int main () {
	//freopen ("file.in", "r", stdin);
	//freopen ("file.out", "w", stdout);
	
 	//srand ((unsigned) time ( NULL ));
	//int randomNumber = rand() % 10 + 1;

	scanf ("%d %s %d", &n, &a, &q);

	int cnt = 0;
	while (cnt != q) {
		int l, r;
		scanf ("%d%d", &l, &r);
		
		A[l].pb ({r, ++cnt});
	}
	
	for (int i = n; i >= 1; i--) {
		if (a[i - 1] == 'C') {
			upd (i, 1, 1, n, 1);
			if (v.size() > 0) {
				upd (v.back(), -1, 1, n, 1);
				v.ppb();
			}
		}
		
		else
			v.pb (i);
			
		for (auto j: A[i]) {
			B.clear();
			get (i, j.ff, 1, n, 1);
			
			int x = 0, y = 0;
			for (int k = B.size() - 1; k >= 0; k--)
				x = min (x, y + T[B[k]][1]), y += T[B[k]][0];
			
			int l = 1;
			int r = v.size();
			
			int pos = 0;
			while (l <= r) {
				int md = mid (l, r);
				if (v[v.size() - md] <= j.ff)
					pos = md, l = md + 1;
				else
					r = md - 1;	
			}
			
			ans[j.ss] = max (-x, 0) + pos;
		}	
	}
	
	for (int i = 1; i <= q; i++)
		printf ("%d\n", ans[i]);
		
	return 0;
}

Compilation message

election.cpp: In function 'int main()':
election.cpp:69:31: warning: format '%s' expects argument of type 'char*', but argument 3 has type 'char (*)[500003]' [-Wformat=]
  scanf ("%d %s %d", &n, &a, &q);
                         ~~    ^
election.cpp:69:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d %s %d", &n, &a, &q);
  ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
election.cpp:74:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf ("%d%d", &l, &r);
   ~~~~~~^~~~~~~~~~~~~~~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 13 ms 12316 KB Output is correct
3 Correct 13 ms 12592 KB Output is correct
4 Correct 15 ms 12592 KB Output is correct
5 Correct 15 ms 12592 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 13 ms 12316 KB Output is correct
3 Correct 13 ms 12592 KB Output is correct
4 Correct 15 ms 12592 KB Output is correct
5 Correct 15 ms 12592 KB Output is correct
6 Correct 94 ms 17592 KB Output is correct
7 Correct 85 ms 18040 KB Output is correct
8 Correct 88 ms 19140 KB Output is correct
9 Correct 84 ms 20224 KB Output is correct
10 Correct 93 ms 21172 KB Output is correct
11 Correct 102 ms 22580 KB Output is correct
12 Correct 105 ms 23260 KB Output is correct
13 Correct 101 ms 24080 KB Output is correct
14 Correct 108 ms 25156 KB Output is correct
15 Correct 107 ms 26300 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 12152 KB Output is correct
2 Correct 13 ms 12316 KB Output is correct
3 Correct 13 ms 12592 KB Output is correct
4 Correct 15 ms 12592 KB Output is correct
5 Correct 15 ms 12592 KB Output is correct
6 Correct 94 ms 17592 KB Output is correct
7 Correct 85 ms 18040 KB Output is correct
8 Correct 88 ms 19140 KB Output is correct
9 Correct 84 ms 20224 KB Output is correct
10 Correct 93 ms 21172 KB Output is correct
11 Correct 102 ms 22580 KB Output is correct
12 Correct 105 ms 23260 KB Output is correct
13 Correct 101 ms 24080 KB Output is correct
14 Correct 108 ms 25156 KB Output is correct
15 Correct 107 ms 26300 KB Output is correct
16 Correct 859 ms 52932 KB Output is correct
17 Correct 841 ms 56620 KB Output is correct
18 Correct 747 ms 64912 KB Output is correct
19 Correct 770 ms 74020 KB Output is correct
20 Correct 837 ms 81996 KB Output is correct
21 Correct 952 ms 91900 KB Output is correct
22 Correct 879 ms 99376 KB Output is correct
23 Correct 891 ms 105884 KB Output is correct
24 Correct 760 ms 113900 KB Output is correct
25 Correct 774 ms 121836 KB Output is correct