Submission #1310132

#	Time	Username	Problem	Language	Result	Execution time	Memory
1310132		thuhienne	Misspelling (JOI22_misspelling)	C++20	28 / 100	60 ms	4684 KiB

misspelling

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define thuhien ""
#define re exit(0);

const int mod = 1e9 + 7;
const int maxn = 2009;

int n,m;
pair <int,int> cond[maxn];

int dp[maxn][27];
//dp i j: so cach build [i,n] thoa man dieu kien trong m cai tren

int maxarr[maxn][maxn][2];

int main() {
//  ios_base::sync_with_stdio(0);
//  cin.tie(nullptr);
	if (fopen(thuhien".inp","r")) {
	   freopen(thuhien".inp","r",stdin);
	   freopen(thuhien".out","w",stdout);
	}
	
	cin >> n >> m;
	for (int i = 1;i <= m;i++) {
		int a,b;cin >> a >> b;
		cond[i] = {a,b};
		int l = min(a,b),r = max(a,b);
		maxarr[l][l][a > b] = max(maxarr[l][l][a > b],r);
	}

	for (int i = n;i >= 1;i--) {
		for (int j = i + 1;j <= n;j++) {
			maxarr[i][j][0] = max(maxarr[i][j - 1][0],maxarr[j][j][0]);
			maxarr[i][j][1] = max(maxarr[i][j - 1][1],maxarr[j][j][1]);
		}
	}
	
	for (int i = n;i >= 1;i--) {
		for (int j = 0;j <= 'z' - 'a';j++) {
			
			dp[i][j] = 1;
			
			for (int k = i;k <= n;k++) {
				
				int less = maxarr[i][k][0];
				int greater = maxarr[i][k][1];
				
				if (less > k && greater > k) continue;
				else if (less <= k && greater <= k) {
					
					for (int h = 0;h <= 'z' - 'a';h++) if (j != h) {
						dp[i][j] = (dp[i][j] + dp[k + 1][h]) % mod;
					}
					
				} else {
					
					for (int h = 0;h <= 'z' - 'a';h++) if ((less > k && j < h) || (greater > k && j > h)) {
						dp[i][j] = (dp[i][j] + dp[k + 1][h]) % mod;
					}
					
				}
				
			}
		
		}
	}
	
	int res = 0;
	for (int h = 0;h <= 'z' - 'a';h++) res = (res + dp[1][h]) % mod;

	cout << res;

}

Compilation message (stderr)

misspelling.cpp: In function 'int main()':
misspelling.cpp:24:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |            freopen(thuhien".inp","r",stdin);
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
misspelling.cpp:25:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |            freopen(thuhien".out","w",stdout);
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 20 / 20
• Subtask 3: 0 / 29
• Subtask 4: 0 / 32
• Subtask 5: 0 / 11