oj.uz

Submission #239084

# Submission time Handle Problem Language Result Execution time Memory
239084 2020-06-14T10:46:52 Z urd05 Land of the Rainbow Gold (APIO17_rainbow) C++14
23 / 100
 91 ms 5196 KB 
#include <bits/stdc++.h>
using namespace std;

char str[100001];
int r,c,sr,sc;
int l;
int arr[51][200001];
typedef pair<int,int> P;
vector<int> st[3];
vector<int> en[3];
vector<int> ts;
vector<int> te;

void init(int rr,int cc,int srr,int scc,int m,char s[]) {
    r=rr;
    c=cc;
    sr=srr;
    sc=scc;
    l=m;
    for(int i=0;i<m;i++) {
        str[i]=s[i];
    }
    arr[sr][sc]=1;
    vector<P> v;
    int x=sr;
    int y=sc;
    v.push_back(P(x,y));
    for(int i=0;i<m;i++) {
        if (str[i]=='W') {
            y--;
        }
        if (str[i]=='E') {
            y++;
        }
        if (str[i]=='N') {
            x--;
        }
        if (str[i]=='S') {
            x++;
        }
        arr[x][y]=1;
        v.push_back(P(x,y));
    }
    if (r==2) {
        for(int j=1;j<=2;j++) {
            bool flag=false;
            for(int i=1;i<=c;i++) {
                if (arr[j][i]==0) {
                    if (!flag) {
                        flag=true;
                        st[j].push_back(i);
                    }
                }
                if (arr[j][i]==1) {
                    if (flag) {
                        flag=false;
                        en[j].push_back(i-1);
                    }
                }
            }
            if (arr[j][c]==0) {
                en[j].push_back(c);
            }
        }
        bool flag=false;
        for(int i=1;i<=c;i++) {
            if (arr[1][i]==1&&arr[2][i]==1) {
                if (!flag) {
                    flag=true;
                    ts.push_back(i);
                }
            }
            else {
                if (flag) {
                    flag=false;
                    te.push_back(i-1);
                }
            }
        }
        if (arr[1][c]==1&&arr[2][c]==1) {
            te.push_back(c);
        }
    }
}

struct UnionFind {
    P p[51][51];
    void init() {
        for(int i=1;i<=r;i++) {
            for(int j=1;j<=c;j++) {
                p[i][j]=P(-1,-1);
            }
        }
    }
    P find(int x,int y) {
        if (p[x][y]<P(0,0)) {
            return P(x,y);
        }
        p[x][y]=find(p[x][y].first,p[x][y].second);
        return p[x][y];
    }
    int merge(P a,P b) {
        a=find(a.first,a.second);
        b=find(b.first,b.second);
        if (a==b) {
            return 0;
        }
        p[b.first][b.second]=a;
        return 1;
    }
};

int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};

int solve1(int ar,int ac,int br,int bc) {
    UnionFind uf;
    uf.init();
    int sum=0;
    for(int i=ar;i<=br;i++) {
        for(int j=ac;j<=bc;j++) {
            if (arr[i][j]==0) {
                sum++;
                for(int k=0;k<4;k++) {
                    int x=i+dx[k];
                    int y=j+dy[k];
                    if (x>=ar&&x<=br&&y>=ac&&y<=bc&&arr[x][y]==0) {
                        sum-=uf.merge(P(i,j),P(x,y));
                    }
                }
            }
        }
    }
    return sum;
}

int solve2(int ar,int ac,int br,int bc) {
    if (ar==br) {
        int fr=lower_bound(en[ar].begin(),en[ar].end(),ac)-en[ar].begin();
        int ba=upper_bound(st[ar].begin(),st[ar].end(),bc)-st[ar].begin()-1;
        int ret=ba-fr+1;
        return ret;
    }
    else {
        if (ac==bc) {
            return (arr[1][ac]==1&&arr[2][ac]==1)?0:1;
        }
        int fr=lower_bound(te.begin(),te.end(),ac)-te.begin();
        int ba=upper_bound(ts.begin(),ts.end(),bc)-ts.begin()-1;
        int ret=ba-fr;
        if (arr[1][ac]==0||arr[2][ac]==0) {
            ret++;
        }
        if (arr[1][bc]==0||arr[2][bc]==0) {
            ret++;
        }
        return ret;
    }
}

int colour(int ar,int ac,int br,int bc) {
    if (r<=50&&c<=50) {
        return solve1(ar,ac,br,bc);
    }
    if (r==2) {
        return solve2(ar,ac,br,bc);
    }
}

Compilation message

rainbow.cpp: In function 'int colour(int, int, int, int)':
rainbow.cpp:168:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 512 KB Output is correct
2 Correct 16 ms 640 KB Output is correct
3 Correct 35 ms 640 KB Output is correct
4 Correct 34 ms 640 KB Output is correct
5 Correct 15 ms 640 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 29 ms 640 KB Output is correct
12 Correct 25 ms 640 KB Output is correct
13 Correct 16 ms 640 KB Output is correct
14 Correct 11 ms 768 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 512 KB Output is correct
17 Correct 5 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 71 ms 1552 KB Output is correct
4 Correct 86 ms 5144 KB Output is correct
5 Correct 84 ms 5068 KB Output is correct
6 Correct 82 ms 4916 KB Output is correct
7 Correct 86 ms 5196 KB Output is correct
8 Correct 72 ms 4300 KB Output is correct
9 Correct 88 ms 5068 KB Output is correct
10 Correct 91 ms 5072 KB Output is correct
11 Correct 82 ms 4812 KB Output is correct
12 Correct 64 ms 4612 KB Output is correct
13 Correct 71 ms 4940 KB Output is correct
14 Correct 71 ms 5068 KB Output is correct
15 Correct 74 ms 4812 KB Output is correct
16 Correct 72 ms 4532 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Runtime error 9 ms 896 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #4
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 512 KB Output is correct
2 Correct 16 ms 640 KB Output is correct
3 Correct 35 ms 640 KB Output is correct
4 Correct 34 ms 640 KB Output is correct
5 Correct 15 ms 640 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 29 ms 640 KB Output is correct
12 Correct 25 ms 640 KB Output is correct
13 Correct 16 ms 640 KB Output is correct
14 Correct 11 ms 768 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 512 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Runtime error 7 ms 896 KB Execution killed with signal 11 (could be triggered by violating memory limits)
19 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 512 KB Output is correct
2 Correct 16 ms 640 KB Output is correct
3 Correct 35 ms 640 KB Output is correct
4 Correct 34 ms 640 KB Output is correct
5 Correct 15 ms 640 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 29 ms 640 KB Output is correct
12 Correct 25 ms 640 KB Output is correct
13 Correct 16 ms 640 KB Output is correct
14 Correct 11 ms 768 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 512 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Runtime error 7 ms 896 KB Execution killed with signal 11 (could be triggered by violating memory limits)
19 Halted 0 ms 0 KB -