답안 #68254 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
68254	2018-08-16T10:13:19 Z	BThero	The Kingdom of JOIOI (JOI17_joioi)	C++17	60 / 100	354 ms	2180 KB

joioi

// Why I am so dumb? :c
#include <bits/stdc++.h>

#define pb push_back
#define mp make_pair

#define all(x) (x).begin(), (x).end()

#define fi first
#define se second

using namespace std;

typedef long long ll;

const int MAXN = (int)2e2 + 3;

pair<int, int> pref[MAXN][MAXN];

pair<int, int> suff[MAXN][MAXN];

int newArr[MAXN][MAXN];

int arr[MAXN][MAXN];

int rl[MAXN * MAXN];

int n, m, k, ans;

void compress() {
	vector<int> vv;

	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			vv.pb(arr[i][j]);
		}
	}

	sort(all(vv));
	vv.resize(unique(all(vv)) - vv.begin());

	k = vv.size();

	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			int ps = upper_bound(all(vv), arr[i][j]) - vv.begin();
			rl[ps] = arr[i][j];
			arr[i][j] = ps;
		}
	}
}

void solve() {                   
	scanf("%d %d", &n, &m);

    for (int i = 1; i <= n; ++i) {
    	for (int j = 1; j <= m; ++j) {
    		scanf("%d", &arr[i][j]);
    	}
    }

    compress();
    // fi -> max, se -> min

    ans = rl[k] - rl[1];

    for (int step = 0; step < 4; ++step) {    	
    	for (int i = 1; i <= n; ++i) {
    		pref[i][1] = mp(arr[i][1], arr[i][1]);
    		suff[i][m] = mp(arr[i][m], arr[i][m]);

    		for (int j = 2; j <= m; ++j) {              
    			pref[i][j].fi = max(pref[i][j - 1].fi, arr[i][j]);
    			pref[i][j].se = min(pref[i][j - 1].se, arr[i][j]);
    		}

    		for (int j = m - 1; j > 0; --j) {
    			suff[i][j].fi = max(suff[i][j + 1].fi, arr[i][j]);
    			suff[i][j].se = min(suff[i][j + 1].se, arr[i][j]);
    		}
    	}

    	// L first

    	for (int lim = 2; lim <= k; ++lim) {
    		{ // pref
    		int ptr = m, cur = 0, cur2 = 0;

    		for (int i = 1; i <= n; ++i) {
    			while (ptr > 0 && pref[i][ptr].se < lim) {
    				--ptr;
    			}

    			if (ptr < 1) {
    				break;
    			}

    			cur = max(cur, pref[i][ptr].fi);

    			if (ptr < m) {
    				cur2 = max(cur2, suff[i][ptr + 1].fi);
    			}
    		}

    		if (ptr > 0 && cur == k) {
    			ans = min(ans, max(rl[k] - rl[lim], rl[cur2] - rl[1]));
    		}
    		}

    		{ // suff
    		int ptr = 1, cur = 0, cur2 = 0;

    		for (int i = 1; i <= n; ++i) {
    			while (ptr <= m && suff[i][ptr].se < lim) {
    				++ptr;
    			}

    			if (ptr > m) {
    				break;
    			}

    			cur = max(cur, suff[i][ptr].fi);

    			if (ptr > 1) {
    				cur2 = max(cur2, pref[i][ptr - 1].fi);
    			}
    		}

    		if (ptr <= m && cur == k) {
    			ans = min(ans, max(rl[k] - rl[lim], rl[cur2] - rl[1]));
    		}
    		}
    	}

    	// for R
    	for (int lim = 1; lim < k; ++lim) {
    		{
    		int ptr = m, cur = k + 1, cur2 = k + 1;

    		for (int i = 1; i <= n; ++i) {
    			while (ptr > 0 && pref[i][ptr].fi > lim) {
    				--ptr;
    			}

    			if (ptr < 1) {
    				break;
    			}

    			cur = min(cur, pref[i][ptr].se);

    			if (ptr < m) {
    				cur2 = min(cur2, suff[i][ptr + 1].se);
    			}
    		}

    		if (ptr > 0 && cur == 1) {
    			ans = min(ans, max(rl[lim] - rl[1], rl[k] - rl[cur2]));
    		}
    		}

    		{
    		int ptr = 1, cur = k + 1, cur2 = k + 1;

    		for (int i = 1; i <= n; ++i) {
    			while (ptr <= m && suff[i][ptr].fi > lim) {
    				++ptr;
    			}

    			if (ptr > m) {
    				break;
    			}

    			cur = min(cur, suff[i][ptr].se);

    			if (ptr > 1) {
    				cur2 = min(cur2, pref[i][ptr - 1].se);
    			}
    		}

    		if (ptr <= m && cur == 1) {
    			ans = min(ans, max(rl[lim] - rl[1], rl[k] - rl[cur2]));
    		}
    		}
    	}
		
		// rotate array

		for (int i = 1; i <= n; ++i) {
			for (int j = 1; j <= m; ++j) {
				newArr[m - j + 1][i] = arr[i][j];
			}
		}

		swap(n, m);

		for (int i = 1; i <= n; ++i) {
			for (int j = 1; j <= m; ++j) {
				arr[i][j] = newArr[i][j];
			}
		}
    }

    printf("%d\n", ans);
}

int main() {    
    int tt = 1;

    while (tt--) {
        solve();
    }

    return 0;
}

Compilation message

joioi.cpp: In function 'void solve()':
joioi.cpp:54:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
joioi.cpp:58:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d", &arr[i][j]);
       ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	3 ms	604 KB	Output is correct
6	Correct	3 ms	604 KB	Output is correct
7	Correct	2 ms	604 KB	Output is correct
8	Correct	3 ms	604 KB	Output is correct
9	Correct	2 ms	604 KB	Output is correct
10	Correct	2 ms	604 KB	Output is correct
11	Correct	3 ms	604 KB	Output is correct
12	Correct	3 ms	656 KB	Output is correct
13	Correct	2 ms	656 KB	Output is correct
14	Correct	3 ms	656 KB	Output is correct

Subtask #2
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	3 ms	604 KB	Output is correct
6	Correct	3 ms	604 KB	Output is correct
7	Correct	2 ms	604 KB	Output is correct
8	Correct	3 ms	604 KB	Output is correct
9	Correct	2 ms	604 KB	Output is correct
10	Correct	2 ms	604 KB	Output is correct
11	Correct	3 ms	604 KB	Output is correct
12	Correct	3 ms	656 KB	Output is correct
13	Correct	2 ms	656 KB	Output is correct
14	Correct	3 ms	656 KB	Output is correct
15	Correct	4 ms	1536 KB	Output is correct
16	Correct	10 ms	1764 KB	Output is correct
17	Correct	154 ms	1956 KB	Output is correct
18	Correct	237 ms	2056 KB	Output is correct
19	Correct	225 ms	2060 KB	Output is correct
20	Correct	150 ms	2072 KB	Output is correct
21	Correct	155 ms	2072 KB	Output is correct
22	Correct	317 ms	2072 KB	Output is correct
23	Correct	226 ms	2180 KB	Output is correct
24	Correct	205 ms	2180 KB	Output is correct
25	Correct	184 ms	2180 KB	Output is correct
26	Correct	146 ms	2180 KB	Output is correct
27	Correct	145 ms	2180 KB	Output is correct
28	Correct	142 ms	2180 KB	Output is correct

Subtask #3
0 / 40.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	520 KB	Output is correct
4	Correct	2 ms	520 KB	Output is correct
5	Correct	3 ms	604 KB	Output is correct
6	Correct	3 ms	604 KB	Output is correct
7	Correct	2 ms	604 KB	Output is correct
8	Correct	3 ms	604 KB	Output is correct
9	Correct	2 ms	604 KB	Output is correct
10	Correct	2 ms	604 KB	Output is correct
11	Correct	3 ms	604 KB	Output is correct
12	Correct	3 ms	656 KB	Output is correct
13	Correct	2 ms	656 KB	Output is correct
14	Correct	3 ms	656 KB	Output is correct
15	Correct	4 ms	1536 KB	Output is correct
16	Correct	10 ms	1764 KB	Output is correct
17	Correct	154 ms	1956 KB	Output is correct
18	Correct	237 ms	2056 KB	Output is correct
19	Correct	225 ms	2060 KB	Output is correct
20	Correct	150 ms	2072 KB	Output is correct
21	Correct	155 ms	2072 KB	Output is correct
22	Correct	317 ms	2072 KB	Output is correct
23	Correct	226 ms	2180 KB	Output is correct
24	Correct	205 ms	2180 KB	Output is correct
25	Correct	184 ms	2180 KB	Output is correct
26	Correct	146 ms	2180 KB	Output is correct
27	Correct	145 ms	2180 KB	Output is correct
28	Correct	142 ms	2180 KB	Output is correct
29	Execution timed out	354 ms	2180 KB	Time limit exceeded (wall clock)
30	Halted	0 ms	0 KB	-

답안 #68254

Compilation message

Subtask #1 15.0 / 15.0

Subtask #2 45.0 / 45.0

Subtask #3 0 / 40.0

Subtask #1
15.0 / 15.0

Subtask #2
45.0 / 45.0

Subtask #3
0 / 40.0