oj.uz

Submission #416527

# Submission time Handle Problem Language Result Execution time Memory
416527 2021-06-02T14:46:26 Z MarcoMeijer Nafta (COI15_nafta) C++14
34 / 100
 294 ms 55140 KB 
#include <bits/stdc++.h>
using namespace std;

typedef pair<int,int> ii;
typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<ll> vll;

#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define RE(a,b) REP(a,0,b)
#define RE1(a,b) REP(a,1,b+1)
#define FOR(a,b) for(auto& a : b)
#define pb push_back
#define all(a) a.begin(),a.end()
#define fi first
#define se second

const int INF	= 1e9;
const int MX	= 3000;
const int N	= 1<<20;
const int MOD	= 1e9+7;

int r, s;
char gr[MX][MX];
int dx[]={-1,0,1,0};
int dy[]={0,-1,0,1};

// grid
bool inside(int x, int y) {
  return x>=0&&y>=0&&x<r&&y<s;
}
bool isOil(int x, int y) {
  if(!inside(x,y)) return 0;
  return gr[x][y] != '.';
}

// DSU
int ra[N], p[N], minx[N], maxx[N], sm[N];
void builddsu() {
  RE(x,r) RE(y,s) {
    int i=x+y*r;
    ra[i]=0, p[i]=i, minx[i]=y, maxx[i]=y, sm[i]=0;
    if(gr[x][y] != '.') sm[i]=gr[x][y]-'0';
  }
}
int getSet(int i) {return i==p[i] ? i : p[i]=getSet(p[i]);}
void unionSet(int i, int j) {
  i = getSet(i); j = getSet(j);
  if(i == j) return;
  sm[i] = sm[j] = sm[i]+sm[j];
  minx[i] = minx[j] = min(minx[i], minx[j]);
  maxx[i] = maxx[j] = max(maxx[i], maxx[j]);
  if(ra[i] > ra[j]) {
    p[j]=i;
  } else {
    p[i]=j;
    if(ra[i] == ra[j]) ra[j]++;
  }
}

// daq dp
int cost[MX][MX];
int dp[MX][MX];
void daq(int x, int l, int r, int al, int ar) {
  if(r < l) return;
  int m=(l+r)/2;

  int bsti=al,bstAns=0;
  REP(i,al,ar+1) {
    if(i+1 > m) continue;
    int nAns = dp[i][x-1] + cost[i+1][m];
    if(nAns > bstAns) {
      bstAns = nAns;
      bsti=i;
    }
  }
  dp[m][x] = bstAns;

  daq(x,l,m-1,al,bsti);
  daq(x,m+1,r,bsti,ar);
}

int main() {
  cin>>r>>s;
  RE(i,r) RE(j,s) cin>>gr[i][j];

  builddsu();
  RE(x,r) RE(y,s) RE(d,4) {
    int nx=x+dx[d];
    int ny=y+dy[d];
    if(!isOil(x,y) || !isOil(nx,ny)) continue;
    unionSet(x+y*r, nx+ny*r);
  }

  RE(i,r*s) {
    if(p[i] != i) continue;
    if(!sm[i]) continue;
    cost[minx[i]  ][maxx[i]  ] += sm[i];
    cost[maxx[i]+1][maxx[i]+1] -= sm[i];
  }


  RE(i,s) RE(j,s) {
    if(i)
      cost[i][j] += cost[i-1][j];
    if(j)
      cost[i][j] += cost[i][j-1];
    if(i && j)
      cost[i][j] -= cost[i-1][j-1];
  }

  RE(i,s) {
    dp[i][0] = 0;
    RE(j,i+1) dp[i][0] = max(dp[i][0], cost[j][i]);
  }

  REP(i,1,s) {
    daq(i,0,s-1,0,s-1);
  }

  RE(i,s) cout<<dp[s-1][i]<<endl;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 14 ms 6080 KB Output is correct
8 Correct 17 ms 6148 KB Output is correct
9 Correct 17 ms 6092 KB Output is correct
10 Correct 14 ms 6148 KB Output is correct
11 Correct 14 ms 6104 KB Output is correct
12 Correct 15 ms 6092 KB Output is correct

Subtask #3
0 / 66.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 844 KB Output is correct
2 Correct 1 ms 844 KB Output is correct
3 Correct 1 ms 844 KB Output is correct
4 Correct 1 ms 844 KB Output is correct
5 Correct 1 ms 844 KB Output is correct
6 Correct 1 ms 844 KB Output is correct
7 Correct 14 ms 6080 KB Output is correct
8 Correct 17 ms 6148 KB Output is correct
9 Correct 17 ms 6092 KB Output is correct
10 Correct 14 ms 6148 KB Output is correct
11 Correct 14 ms 6104 KB Output is correct
12 Correct 15 ms 6092 KB Output is correct
13 Runtime error 294 ms 55140 KB Execution killed with signal 11
14 Halted 0 ms 0 KB -