제출 #119281

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
119281		eriksuenderhauf	Sails (IOI07_sails)	C++11	0 / 100	122 ms	4296 KiB

sails

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
#define mem(a,v) memset((a), (v), sizeof (a))
#define enl printf("\n")
#define case(t) printf("Case #%d: ", (t))
#define ni(n) scanf("%d", &(n))
#define nl(n) scanf("%lld", &(n))
#define nai(a, n) for (int i = 0; i < (n); i++) ni(a[i])
#define nal(a, n) for (int i = 0; i < (n); i++) nl(a[i])
#define pri(n) printf("%d\n", (n))
#define prl(n) printf("%lld\n", (n))
#define pii pair<int, int>
#define pil pair<int, long long>
#define pll pair<long long, long long>
#define vii vector<pii>
#define vil vector<pil>
#define vll vector<pll>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef cc_hash_table<int,int,hash<int>> ht;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> oset;
const double pi = acos(-1);
const int MOD = 1e9 + 7;
const int INF = 1e9 + 7;
const int MAXN = 1e5 + 5;
const double eps = 1e-9;
int seg[MAXN*4], lazy[MAXN*4];

void prop(int l, int r, int k) {
	if (lazy[k] == 0) return;
	if (l != r) {
		lazy[k*2] += lazy[k];
		lazy[k*2+1] += lazy[k];
	}
	seg[k] += lazy[k];
	lazy[k] = 0;
}

void upd(int l, int r, int k, int a, int b) {
	prop(l, r, k);
	if (a > r || l > b) return;
	if (a <= l && r <= b) {
		lazy[k] += 1;
		prop(l, r, k);
		return;
	}
	int m = (l+r) / 2;
	upd(l, m, k*2, a, b);
	upd(m+1, r, k*2+1, a, b);
	seg[k] = min(seg[k*2], seg[k*2+1]);
}

int qry(int l, int r, int k, int a) {
	prop(l, r, k);
	if (r < a || a < l) return 0;
	if (a <= l && r <= a) return seg[k];
	int m = (l+r) / 2;
	return qry(l, m, k*2, a) + qry(m+1, r, k*2+1, a);
}

int search(int l, int r, int k, int b) {
	prop(l, r, k);
	if (l == r) return l;
	int m = (l+r) / 2;
	if (seg[k*2] <= seg[k*2+1] || b <= m)
		return search(l, m, k*2, b);
	return search(m+1, r, k*2+1, b);
}

pii a[MAXN];

int main() {
	int n;
	ni(n);
	for (int i = 0; i < n; i++) {
		int h, k;
		scanf("%d %d", &h, &k);
		a[i] = mp(h, k);
	}
	sort(a, a + n);
	for (int i = 0; i < n; i++) {
		int h, k;
		tie(h, k) = a[i];
		int st = search(1, MAXN - 1, 1, h);
		upd(1, MAXN-1, 1, st, min(st+k-1, h));
		if (st+k-1 > h)
			upd(1, MAXN-1, 1, 1, st+k-1-h);
	}
	ll ans = 0;
	for (int i = 1; i < MAXN; i++) {
		ll val = qry(1,MAXN-1,1,i);
		ans += ((val-1)*val) / 2ll;
	}
	prl(ans);
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sails.cpp: In function 'int main()':
sails.cpp:9:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define ni(n) scanf("%d", &(n))
               ~~~~~^~~~~~~~~~~~
sails.cpp:84:2: note: in expansion of macro 'ni'
  ni(n);
  ^~
sails.cpp:87:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &h, &k);
   ~~~~~^~~~~~~~~~~~~~~~~

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