oj.uz

답안 #1081462

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1081462 2024-08-30T05:15:23 Z kes0716 Archery (IOI09_archery) C++17
65 / 100
 293 ms 14632 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 200009;
int n, r, crit;
int a[2*MAXN];
struct State{
	int pl, ze, mi;
	State operator+(const State &s) const{
		return (State){pl+s.pl, ze+s.ze, mi+s.mi};
	}
} init[MAXN];
int simulate1(void){
	vector<State> pot(5*n);
	State pq = {0, 0, 0};
	int i, j;
	for(i=0; i<n; i++){
		pot[i] = init[i];
	}
	for(i=n; i<5*n; i++)
		pot[i] = {0, 0, 0};
	int cnt = 0, last = -1;
	int lwin = (init[0].pl ? 1 : (init[0].ze ? 0 : -1));
	for(i=0; i<4*n; i++){
		pq = pq + pot[i];
		int oppb;
		//printf("i=%d pq= +%d 0%d -%d\n", i, pq.pl, pq.ze, pq.mi);
		if(pq.pl >= 2){
			oppb = 1;
			pot[i+n].pl++;
			pq.pl--;
		}
		else if(pq.pl == 1){
			if(lwin == 1){
				if(pq.ze){
					oppb = 0;
					pot[i+n].ze++;
					pq.ze--;
				}
				else{
					oppb = -1;
					pot[i+n].mi++;
					pq.mi--;
				}
			}
			else{
				oppb = 1;
				pot[i+n].pl++;
				pq.pl--;
			}
		}
		else if(pq.ze && lwin){
			oppb = 0;
			pot[i+n].ze++;
			pq.ze--;
		}
		else{
			oppb = -1;
			pot[i+n].mi++;
			pq.mi--;
		}
		if(!lwin || !oppb)
			last = i;
		if(i==r)
			break;
		if(!oppb && lwin == 1)
			cnt++;
		else if(!lwin && oppb == 1)
			cnt++;
		lwin = max(lwin, oppb);
	}
	//printf("last=%d cnt=%d\n", last, cnt);
	int ret = last - r - n*cnt;
	return ret;
}
int simulate2(int pos){
	State pq = {0, 0, 0};
	int i, ans = pos;
	for(i=2*n; i>=1; i--){
		int cur = i%n;
		pq = pq + init[cur];
		//printf("i=%d pq.pl=%d ze=%d mi=%d\n", i,pq.pl, pq.ze, pq.mi);
		init[cur].pl = init[cur].mi = init[cur].ze = 0;
		if(cur){
			if(pq.mi){
				if(pq.ze)
					ans--;
				init[cur].mi = 1;
				pq.mi--;
			}
			else if(pq.ze){
				init[cur].ze = 1;
				pq.ze--;
			}
		}
		else{
			if(pq.ze)
				ans--;
		}
	}
	return ans;
}
int simulate(int p){
	int i, j=0;
	for(i=0; i<n; i++){
		init[i].pl = init[i].ze = init[i].mi = 0;
		if(p == i)
			init[i].ze++;
		else{
			if(a[j] < crit)
				init[i].pl++;
			else
				init[i].mi++;
			j++;
		}
		if(a[j] < crit)
			init[i].pl++;
		else
			init[i].mi++;
		j++;
	}
	if(crit <= n+1)
		return simulate1();
	return simulate2(p);
}
int main(){
	int i;
	scanf("%d %d", &n, &r);
	r = 3*n + r%n;
	scanf("%d", &crit);
	for(i=0; i<2*n-1; i++){
		scanf("%d", &a[i]);
	}
	if(crit==1){
		printf("%d\n", n);
		return 0;
	}
	pair<int, int> ans = make_pair(n, -1);	//(result, -start)
	for(int t=-3; t<=0; t++){
		int goal = t*n, lo = 0, hi = n-1, mid;
		while(lo < hi){
			mid = (lo+hi)/2;
			if(simulate(mid) >= goal)
				hi = mid;
			else
				lo = mid+1;
		}
		int crit = simulate(lo);
		//printf("lo=%d crit=%d\n", lo, crit);
		hi = n-1;
		while(lo < hi){
			mid = (lo+hi+1)/2;
			if(simulate(mid) == crit)
				lo = mid;
			else
				hi = mid-1;
		}
		//printf("lo=%d\n", lo);
		ans = min(ans, make_pair((crit%n + n)%n, -lo-1));
	}
	printf("%d\n", -ans.second);
	return 0;
}

Compilation message

archery.cpp: In function 'int simulate1()':
archery.cpp:15:9: warning: unused variable 'j' [-Wunused-variable]
   15 |  int i, j;
      |         ^
archery.cpp: In function 'int main()':
archery.cpp:127:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  127 |  scanf("%d %d", &n, &r);
      |  ~~~~~^~~~~~~~~~~~~~~~~
archery.cpp:129:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  129 |  scanf("%d", &crit);
      |  ~~~~~^~~~~~~~~~~~~
archery.cpp:131:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  131 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Subtask #1
5.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 2 ms 648 KB Output isn't correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #2
60.0 / 94.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 348 KB Output isn't correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Incorrect 2 ms 348 KB Output isn't correct
4 Incorrect 22 ms 1588 KB Output isn't correct
5 Correct 293 ms 13980 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Incorrect 2 ms 348 KB Output isn't correct
8 Incorrect 15 ms 1648 KB Output isn't correct
9 Correct 24 ms 3988 KB Output is correct
10 Incorrect 2 ms 348 KB Output isn't correct
11 Incorrect 25 ms 4116 KB Output isn't correct
12 Incorrect 2 ms 548 KB Output isn't correct
13 Incorrect 133 ms 10840 KB Output isn't correct
14 Incorrect 5 ms 820 KB Output isn't correct
15 Incorrect 46 ms 4792 KB Output isn't correct
16 Incorrect 0 ms 348 KB Output isn't correct
17 Incorrect 2 ms 348 KB Output isn't correct
18 Incorrect 2 ms 348 KB Output isn't correct
19 Correct 4 ms 652 KB Output is correct
20 Correct 5 ms 820 KB Output is correct
21 Incorrect 20 ms 4104 KB Output isn't correct
22 Correct 28 ms 4696 KB Output is correct
23 Incorrect 212 ms 14632 KB Output isn't correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 4 ms 544 KB Output is correct
27 Correct 33 ms 2652 KB Output is correct
28 Correct 264 ms 3540 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 4 ms 344 KB Output is correct
31 Correct 17 ms 2652 KB Output is correct
32 Correct 209 ms 4028 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 2 ms 348 KB Output is correct
36 Correct 2 ms 348 KB Output is correct
37 Correct 15 ms 2808 KB Output is correct
38 Correct 21 ms 2652 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 2 ms 348 KB Output is correct
42 Correct 2 ms 348 KB Output is correct
43 Correct 4 ms 348 KB Output is correct
44 Correct 9 ms 604 KB Output is correct
45 Correct 18 ms 2904 KB Output is correct
46 Correct 20 ms 2652 KB Output is correct
47 Correct 197 ms 4200 KB Output is correct