Submission #1050067

#	Time	Username	Problem	Language	Result	Execution time	Memory
1050067		vjudge1	Dango Maker (JOI18_dango_maker)	C++17	13 / 100	2100 ms	4444 KiB

dango_maker

#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;
int n, m;
vector<pair<int ,int>> v;int mx=0;
void b(string * s, int mas[][3000], int sh, int p){
    if(p==v.size()){
        mx=max(mx, sh);
        return;
    }
    int x=v[p].f, y=v[p].s;
    int a[n][3000];string sm[n];
    for(int i=0; i<n; i++){
        for(int j=0; j<m; j++){
            a[i][j]=mas[i][j];
        }
        sm[i]=s[i];
    }
    if(x<n-2){
        if(a[x+1][y]==0&&s[x+1][y]=='G'&&s[x+2][y]=='W'&&a[x+2][y]==0){
            a[x+1][y]=1;a[x+2][y]=1;
            b(s, a, sh+1, p+1);
            a[x+1][y]=0;a[x+2][y]=0;
        }
    }
    if(y<m-2){
        if(a[x][y+1]==0&&s[x][y+1]=='G'&&s[x][y+2]=='W'&&a[x][y+2]==0){
            a[x][y+1]=1;a[x][y+2]=1;
            b(s, a, sh+1, p+1);
            a[x][y+1]=0;a[x][y+2]=0;
        }
    }
    b(s, a, sh, p+1);
}
int main() {
    cin >> n >> m;
    string s[n];
    int mas[n][3000];
    for(int i=0; i<n; i++){
        cin >> s[i];
        for(int j=0; j<m; j++){
            if(s[i][j]=='R'){
                v.push_back({i, j});
            }
            mas[i][j]=0;
        }
    }
    b(s, mas, 0, 0);
    cout << mx;
    return 0;
}

Compilation message (stderr)

dango_maker.cpp: In function 'void b(std::string*, int (*)[3000], int, int)':
dango_maker.cpp:8:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     if(p==v.size()){
      |        ~^~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 20
• Subtask 3: 0 / 67