oj.uz

Submission #239083

# Submission time Handle Problem Language Result Execution time Memory
239083 2020-06-14T10:46:07 Z urd05 Land of the Rainbow Gold (APIO17_rainbow) C++14
11 / 100
 78 ms 1552 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][bc]==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[2][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 33 ms 640 KB Output is correct
4 Correct 36 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 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 28 ms 640 KB Output is correct
12 Correct 25 ms 640 KB Output is correct
13 Correct 17 ms 640 KB Output is correct
14 Correct 10 ms 640 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Incorrect 78 ms 1552 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Runtime error 7 ms 768 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 33 ms 640 KB Output is correct
4 Correct 36 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 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 28 ms 640 KB Output is correct
12 Correct 25 ms 640 KB Output is correct
13 Correct 17 ms 640 KB Output is correct
14 Correct 10 ms 640 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Runtime error 7 ms 768 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 33 ms 640 KB Output is correct
4 Correct 36 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 4 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 28 ms 640 KB Output is correct
12 Correct 25 ms 640 KB Output is correct
13 Correct 17 ms 640 KB Output is correct
14 Correct 10 ms 640 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 4 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Runtime error 7 ms 768 KB Execution killed with signal 11 (could be triggered by violating memory limits)
19 Halted 0 ms 0 KB -