oj.uz

Submission #583829

# Submission time Handle Problem Language Result Execution time Memory
583829 2022-06-26T09:12:48 Z BackNoob Sails (IOI07_sails) C++14
0 / 100
 81 ms 2892 KB 
#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define MASK(i) (1LL << (i))
#define ull unsigned long long
#define ld long double
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define BIT(x , i) ((x >> (i)) & 1)
#define TASK "task"
#define sz(s) (int) (s).size()
 
using namespace std;
const int mxN = 1e6 + 227;
const int inf = 1e9 + 277;
const int mod = 1e9 + 7;
const ll infll = 1e18 + 7;
const int base = 307;
const int LOG = 20;
 
template <typename T1, typename T2> bool minimize(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}


int n;
pair<int, int> a[mxN];
int cnt[mxN];
int bit[mxN];
int N = 2e5;


void update(int pos, int val)
{
	for(; pos <= N; pos += pos & -pos) bit[pos] += val;
}
void update_range(int l, int r, int val)
{
	// cout << l << ' ' << r << endl;
	update(l, val);
	update(r + 1, -val);
}
int getval(int pos)
{
	int res = 0;
	for(; pos > 0; pos -= pos & -pos) res += bit[pos];
	return res;
}
int findpos(int r)
{
	int x = getval(r);
	int lo = 1, hi = r;
	while(lo + 1 < hi) {
		int mid = (lo + hi) / 2;
		if(getval(mid) > x) lo = mid;
		else hi = mid;
	}
	if(getval(lo) == x) return lo;
	return hi;
}

void solve()
{
	cin >> n;

	int maxhigh = -1;
	for(int i = 1; i <= n; i++) {
		cin >> a[i].fi >> a[i].se;
		maximize(maxhigh, a[i].fi);
	}

	sort(a + 1, a + 1 + n);
	for(int i = 1; i <= n; i++) {
		// for(int j = 1; j <= n; j++) cout << getval(j) << ' ';
		// cout << endl;
		int pos = findpos(a[i].fi);
		int need = a[i].se;
		// cout << a[i].fi << ' ' << a[i].se << ' ' << pos << endl;
		if(a[i].fi - pos + 1 >= a[i].se) {
			update_range(pos, pos + a[i].se - 1, 1);
		}
		else {
			update_range(pos, a[i].fi, 1);
			need -= (a[i].fi - pos + 1);
			pos = findpos(pos - 1);
			update_range(pos, pos + need - 1, 1);
		}
	}
	// for(int j = 1; j <= n; j++) cout << getval(j) << ' ';
	// cout << endl;


	ll res = 0;
	for(int i = 1; i <= maxhigh; i++) {
		int x = getval(i);
		res += 1LL * x * (x - 1) / 2;
	}
	cout << res;
}
 
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen(TASK".inp" , "r" , stdin);
    //freopen(TASK".out" , "w" , stdout);
 
    int tc = 1;
    //cin >> tc;
    while(tc--) {
    	solve();
    }
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Incorrect 1 ms 328 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 596 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 1032 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 47 ms 1624 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 74 ms 2548 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 72 ms 2800 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 81 ms 2892 KB Output isn't correct
2 Halted 0 ms 0 KB -