Submission #88224

#	Time	Username	Problem	Language	Result	Execution time	Memory
88224		kjain_1810	Maja (COCI18_maja)	C++11	11 / 110	111 ms	836 KiB

maja

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define s second
#define ind(a) scanf("%d", &a)
#define inlld(a) scanf("%lld", &a)
#define ind2(a, b) scanf("%d%d", &a, &b)
#define inlld2(a, b) scanf("%lld%lld", &a, &b)
#define ind3(a, b, c) scanf("%d%d%d", &a, &b, &c)
#define inlld3(a, b, c) scanf("%lld%lld%lld", &a, &b, &c)

using namespace std;

const int N=105+5;
const int MOD=1e9+7;

typedef long long ll;
typedef long double ld;

ll n, m, stx, sty, k, dp[2][N][N], arr[N][N];

int main()
{
    inlld2(n, m);
    inlld2(stx, sty);
    inlld(k);
    for(ll a=1; a<=n; a++)
        for(ll b=1; b<=m; b++)
        {
            inlld(arr[a][b]);
            for(ll c=0; c<=n+m; c++)
                dp[c][a][b]=-1e18;
        }
    dp[0][stx][sty]=0;
    for(ll steps=1; steps<=min(k/2, n*m-1); steps++)
        for(ll a=1; a<=n; a++)
            for(ll b=1; b<=m; b++)
            {
                if(a>1)
                    dp[steps%2][a][b]=max(dp[steps%2][a][b], dp[(steps-1)%2][a-1][b]+arr[a][b]);
                if(b>1)
                    dp[steps%2][a][b]=max(dp[steps%2][a][b], dp[(steps-1)%2][a][b-1]+arr[a][b]);
                if(a<n)
                    dp[steps%2][a][b]=max(dp[steps%2][a][b], dp[(steps-1)%2][a+1][b]+arr[a][b]);
                if(b<m)
                    dp[steps%2][a][b]=max(dp[steps%2][a][b], dp[(steps-1)%2][a][b+1]+arr[a][b]);
                // printf("%lld %lld %lld %lld\n", steps, a, b, dp[steps][a][b]);
            }
    if(k/2<=n*m-1)
    {
        ll ans=0;
        for(ll a=1; a<=n; a++)
            for(ll b=1; b<=m; b++)
                ans=max(ans, 2*dp[(k/2)%2][a][b]-arr[a][b]);
        printf("%lld\n", ans);
        return 0;
    }
    ll ans=0;
    for(ll a=1; a<=n; a++)
        for(ll b=1; b<=m; b++)
        {
            ll here=dp[(n*m-1)%2][a][b];
            ll toadd=0;
            if(a>1)
                toadd=max(toadd, arr[a-1][b]);
            if(a<n)
                toadd=max(toadd, arr[a+1][b]);
            if(b<m)
                toadd=max(toadd, arr[a][b+1]);
            if(b>1)
                toadd=max(toadd, arr[a][b-1]);
            ans=max(ans, 2*here+(k-2*n*m+2)*(toadd+arr[a][b])-arr[a][b]);
        }
    printf("%lld\n", ans);
}


// ll n, m, stx, sty, k, arr[N][N], dp[2][N][N];
// ll changex[]={1, -1, 0, 0}, changey[]={0,0,1,-1};

// int main() 
// {
//     inlld2(n, m);
//     inlld3(stx, sty, k);
//     for(ll a=1; a<=n; a++)
//         for(ll b=1; b<=m; b++)
//         {
//             dp[0][a][b]=-1e18;
//             dp[1][a][b]=-1e18;
//             inlld(arr[a][b]);
//         }
//     k/=2;
//     ll maxi=min(n*m-1, k);
//     dp[0][stx][sty]=0;
//     for(ll a=1; a<=maxi; a++)
//     {
//         ll here=a&1;
//         for(ll b=1; b<=n; b++)
//             for(ll c=1; c<=m; c++)
//                 for(ll d=0; d<=3; d++)
//                 {
//                     ll nexb=b+changex[d];
//                     ll nexc=c+changey[d];
//                     if(nexb<=n && nexb>=1 && nexc<=m && nexc>=1)
//                     {
//                         dp[here][nexb][nexc]=max(dp[here][nexb][nexc], dp[1-here][a][b]+arr[nexb][nexc]);
//                     }
//                 }
//     }
//     ll en=maxi&1, ans=0;
//     for(ll a=1; a<=n; a++)
//         for(ll b=1; b<=m; b++)
//         {
//             ll toadd=0;
//             for(ll c=0; c<=3; c++)
//             {
//                 ll nexa=a+changex[c];
//                 ll nexb=b+changey[c];
//                 if(nexa>=1 && nexa<=n && nexb>=1 && nexb<=m)
//                     toadd=max(toadd, arr[nexa][nexb]);
//             }
//             ans=max(ans, dp[en][a][b]*2+(k-maxi)*(toadd+arr[a][b])-arr[a][b]);
//         }
//     printf("%lld\n", ans);
//     return 0;
// }

Compilation message (stderr)

maja.cpp: In function 'int main()':
maja.cpp:8:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define inlld2(a, b) scanf("%lld%lld", &a, &b)
                      ~~~~~^~~~~~~~~~~~~~~~~~~~
maja.cpp:24:5: note: in expansion of macro 'inlld2'
     inlld2(n, m);
     ^~~~~~
maja.cpp:8:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define inlld2(a, b) scanf("%lld%lld", &a, &b)
                      ~~~~~^~~~~~~~~~~~~~~~~~~~
maja.cpp:25:5: note: in expansion of macro 'inlld2'
     inlld2(stx, sty);
     ^~~~~~
maja.cpp:6:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define inlld(a) scanf("%lld", &a)
                  ~~~~~^~~~~~~~~~~~
maja.cpp:26:5: note: in expansion of macro 'inlld'
     inlld(k);
     ^~~~~
maja.cpp:6:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define inlld(a) scanf("%lld", &a)
                  ~~~~~^~~~~~~~~~~~
maja.cpp:30:13: note: in expansion of macro 'inlld'
             inlld(arr[a][b]);
             ^~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 11
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• Subtask 10: 0 / 11