oj.uz

Submission #233370

# Submission time Handle Problem Language Result Execution time Memory
233370 2020-05-20T10:42:02 Z nicolaalexandra The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 358 ms 62884 KB 
#include <bits/stdc++.h>
#define DIM 2010
#define DIMBUFF 7000000
#define INF 2000000000
using namespace std;
int a[DIM][DIM],b[DIM][DIM],viz[DIM][DIM];
struct idk{
    int val,l,c;
} v[DIM*DIM];
deque <pair<int,int> > c;
int di[] = {-1,1,0,0};
int dj[] = {0,0,-1,1};
int n,m,i,j,sol,mini,maxi,k,pos;
char buff[DIMBUFF];

int verif (int val){

    /// toate valorile < maxi - val trb puse in zona minimelor
    /*for (int i=1;i<=n;i++)
        for (int j=1;j<=m;j++)
            viz[i][j] = 0;*/
    memset (viz,0,sizeof viz);

    for (int i=1;i<=k;++i){
        if (v[i].val >= maxi - val)
            break;
        int lin = v[i].l, col = v[i].c;
        if (viz[lin][col])
            continue;

        c.clear();
        c.push_back(make_pair(lin,col));
        viz[lin][col] = 1;
        while (!c.empty()){
            int ic = c.front().first;
            int jc = c.front().second;
            c.pop_front();
            for (int dir=0;dir<=3;++dir){
                int iv = ic + di[dir];
                int jv = jc + dj[dir];
                if (iv >= lin && iv <= n && jv >= 1 && jv <= col && !viz[iv][jv]){
                    viz[iv][jv] = 1;
                    c.push_back(make_pair(iv,jv));
                }}}}

    int maxim = 0, maxim2 = 0, minim = INF, minim2 = INF;
    for (int i=1;i<=n;++i)
        for (int j=1;j<=m;++j){
            if (viz[i][j]){
                minim = min (minim,a[i][j]);
                maxim = max (maxim,a[i][j]);
            } else {
                minim2 = min (minim2,a[i][j]);
                maxim2 = max (maxim2,a[i][j]);
            }}

    if (max (maxim - minim, maxim2 - minim2) > val)
        return 0;
    return 1;
}

void solve (){

    int st = 0, dr = maxi - mini, val;
    while (st <= dr){
        int mid = (st+dr)>>1;
        if (verif (mid)){
            val = mid;
            dr = mid-1;
        } else st = mid+1;
    }

    sol = min (sol,val);

}

inline int cmp (idk a, idk b){
    return a.val < b.val;
}

void roteste(){

    for (i=1;i<=n;++i)
        for (j=1;j<=m;++j)
            b[m-j+1][i] = a[i][j];
    swap (n,m);

    k = 0;
    for (i=1;i<=n;++i)
        for (j=1;j<=m;++j){
            a[i][j] = b[i][j];
            v[++k] = {a[i][j],i,j};
        }
    sort (v+1,v+k+1,cmp);
}
int get_nr(){
    while (!(buff[pos] >= '0' && buff[pos] <= '9'))
        ++pos;
    int nr = 0;
    while (buff[pos] >= '0' && buff[pos] <= '9'){
        nr = nr*10 + buff[pos] - '0';
        ++pos;
    }
    return nr;
}
int main (){

    //FILE *fin = fopen ("date.in","r");
    //FILE *fout = fopen ("date.out","w");
    FILE *fin = stdin;
    FILE *fout = stdout;

    fread (buff,1,DIMBUFF,fin);
    //cin>>n>>m;
    n = get_nr(), m = get_nr();
    mini = INF;
    for (i=1;i<=n;++i)
        for (j=1;j<=m;++j){
            //cin>>a[i][j];
            a[i][j] = get_nr();
            mini = min (mini,a[i][j]);
            maxi = max (maxi,a[i][j]);
            v[++k] = {a[i][j],i,j};
        }

    sort (v+1,v+k+1,cmp);

    sol = INF;
    solve();

    roteste();
    solve();

    roteste();
    solve();

    roteste();
    solve();

    fprintf(fout,"%d",sol);

    return 0;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:113:11: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     fread (buff,1,DIMBUFF,fin);
     ~~~~~~^~~~~~~~~~~~~~~~~~~~
joioi.cpp: In function 'void solve()':
joioi.cpp:64:35: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int st = 0, dr = maxi - mini, val;
                                   ^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 16256 KB Output is correct
2 Correct 41 ms 16256 KB Output is correct
3 Correct 243 ms 16248 KB Output is correct
4 Correct 243 ms 16252 KB Output is correct
5 Correct 245 ms 16376 KB Output is correct
6 Correct 237 ms 16248 KB Output is correct
7 Correct 239 ms 16248 KB Output is correct
8 Correct 241 ms 16248 KB Output is correct
9 Correct 238 ms 16376 KB Output is correct
10 Correct 247 ms 16256 KB Output is correct
11 Correct 247 ms 16248 KB Output is correct
12 Correct 251 ms 16288 KB Output is correct
13 Correct 247 ms 16248 KB Output is correct
14 Correct 247 ms 16248 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 16256 KB Output is correct
2 Correct 41 ms 16256 KB Output is correct
3 Correct 243 ms 16248 KB Output is correct
4 Correct 243 ms 16252 KB Output is correct
5 Correct 245 ms 16376 KB Output is correct
6 Correct 237 ms 16248 KB Output is correct
7 Correct 239 ms 16248 KB Output is correct
8 Correct 241 ms 16248 KB Output is correct
9 Correct 238 ms 16376 KB Output is correct
10 Correct 247 ms 16256 KB Output is correct
11 Correct 247 ms 16248 KB Output is correct
12 Correct 251 ms 16288 KB Output is correct
13 Correct 247 ms 16248 KB Output is correct
14 Correct 247 ms 16248 KB Output is correct
15 Correct 44 ms 17832 KB Output is correct
16 Correct 61 ms 18800 KB Output is correct
17 Correct 240 ms 19112 KB Output is correct
18 Correct 240 ms 18940 KB Output is correct
19 Correct 236 ms 18940 KB Output is correct
20 Correct 237 ms 18808 KB Output is correct
21 Correct 334 ms 19192 KB Output is correct
22 Correct 337 ms 19004 KB Output is correct
23 Correct 340 ms 19192 KB Output is correct
24 Correct 322 ms 18936 KB Output is correct
25 Correct 334 ms 19192 KB Output is correct
26 Correct 331 ms 19192 KB Output is correct
27 Correct 332 ms 19064 KB Output is correct
28 Correct 358 ms 19064 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 16256 KB Output is correct
2 Correct 41 ms 16256 KB Output is correct
3 Correct 243 ms 16248 KB Output is correct
4 Correct 243 ms 16252 KB Output is correct
5 Correct 245 ms 16376 KB Output is correct
6 Correct 237 ms 16248 KB Output is correct
7 Correct 239 ms 16248 KB Output is correct
8 Correct 241 ms 16248 KB Output is correct
9 Correct 238 ms 16376 KB Output is correct
10 Correct 247 ms 16256 KB Output is correct
11 Correct 247 ms 16248 KB Output is correct
12 Correct 251 ms 16288 KB Output is correct
13 Correct 247 ms 16248 KB Output is correct
14 Correct 247 ms 16248 KB Output is correct
15 Correct 44 ms 17832 KB Output is correct
16 Correct 61 ms 18800 KB Output is correct
17 Correct 240 ms 19112 KB Output is correct
18 Correct 240 ms 18940 KB Output is correct
19 Correct 236 ms 18940 KB Output is correct
20 Correct 237 ms 18808 KB Output is correct
21 Correct 334 ms 19192 KB Output is correct
22 Correct 337 ms 19004 KB Output is correct
23 Correct 340 ms 19192 KB Output is correct
24 Correct 322 ms 18936 KB Output is correct
25 Correct 334 ms 19192 KB Output is correct
26 Correct 331 ms 19192 KB Output is correct
27 Correct 332 ms 19064 KB Output is correct
28 Correct 358 ms 19064 KB Output is correct
29 Runtime error 171 ms 62884 KB Execution killed with signal 11 (could be triggered by violating memory limits)
30 Halted 0 ms 0 KB -