Submission #877900

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
877900	2023-11-23 20:55:13	konber	T-Covering (eJOI19_covering)	C++14	30 / 100	65 ms	10380 KiB

covering

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#include <iostream>
#include <vector>
#include <algorithm>
#include <cstring>
using namespace std;
vector<vector<int>> a, grid;
vector<pair<int, int>> sp;
int K, N, M;
int memo[5003][5];
int dp(int i, int prev){
    if(i==K) return 0;
    if(memo[i][prev] != -1) return memo[i][prev];
    int s1=-1, s2=-1, s3=-1, s4=-1;
    int x=sp[i].first, y=sp[i].second;
    int k=sp[i-1].first, j=sp[i-1].second;
    if(prev==1){
        grid[k][j]=grid[k-1][j]=grid[k+1][j]=grid[k][j-1]=1;
        if(x-1>=0 && x+1<M && y-1>=0 && grid[x-1][y]+grid[x+1][y]+grid[x][y-1]==0){
            int p=dp(i+1, 1);
            if(p != -1)
                s1 = a[x][y]+a[x-1][y]+a[x+1][y]+a[x][y-1]+p;
        }
        if(x-1>=0 && x+1<M && y+1<N && grid[x-1][y]+grid[x+1][y]+grid[x][y+1]==0){
            int p=dp(i+1, 2);
            if(p!=-1)
                s2 = a[x][y]+a[x-1][y]+a[x+1][y]+a[x][y+1]+p;
        }
 
 
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Compilation message (stderr)

covering.cpp: In function 'int main()':
covering.cpp:161:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  161 |     scanf("%d%d", &M, &N);
      |     ~~~~~^~~~~~~~~~~~~~~~
covering.cpp:166:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  166 |             scanf("%d", &a[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~
covering.cpp:168:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  168 |     scanf("%d", &K);
      |     ~~~~~^~~~~~~~~~
covering.cpp:171:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  171 |         scanf("%d%d", &sp[i].first, &sp[i].second);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 15 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 30