Submission #578733

#	Time	Username	Problem	Language	Result	Execution time	Memory
578733		FatihSolak	parentrises (BOI18_parentrises)	C++17	11 / 100	1 ms	384 KiB

parentrises

#include <bits/stdc++.h>
#define N 305
using namespace std;
const int mod = 1e9 + 7;
int dp[N][N][N][2][2];
int ans[N];
void solve1(){
    string s;
    cin >> s;
    int n = s.size();
    vector<int> r,b;
    int br = 0,bb = 0;
    string ans = "";
    for(int i = 0;i<n;i++){
        ans += ".";
        if(s[i]  == '('){
            if(r.size() <= b.size()){
                ans[i] = 'R';
                br++;
                r.push_back(i);
            }
            else{
                ans[i] = 'B';
                bb++;
                b.push_back(i);
            }
        }
        if(s[i] == ')'){
            if(br + bb == 0){
                if(r.empty() && b.empty()){
                    cout << "impossible" << endl;
                    return;
                }
                if(r.size() >= b.size()){
                    ans[r.back()] = 'G';
                    r.pop_back();
                    bb++;
                }
                else{
                    ans[b.back()] = 'G';
                    b.pop_back();
                    br++;
                }
            }
            if(br >= bb){
                ans[i] = 'R';
                br--;
            }
            else{
                ans[i] = 'B';
                bb--;
            }
        }
    }
    for(int i = n-1;i>=0;i--){
        if(s[i] == ')'){
            if(ans[i] == 'B' && br){
                ans[i] = 'G';
                br--;
            }
            if(ans[i] == 'R' && bb){
                ans[i] = 'G';
                bb--;
            }
        }
    }
    if(br || bb){
        cout << "impossible" << endl;
        return;
    }
    cout << ans << endl;
}
void solve2(){
    int n;
    cin >> n;
    cout << ans[n] << endl;
}
int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif
    /*
    dp[0][0][0][0][0] = 1;
    for(int i = 0;i<N-2;i++){
        for(int j = 0;j<N-2;j++){
            for(int c = 0;c<=j;c++){
                for(int d = 0;d<2;d++){
                    for(int e = 0;e<2;e++){
                        for(int f = 0;f<2;f++){
                            for(int g = 0;g<2;g++){
                                if(d == f && e > g)continue;
                                int dx = (f == 0?g+1:0);
                                int dy = (f == 1?g+1:0);
                                dp[i+1][j+dx][c+dy][f][g] = (dp[i+1][j+dx][c+dy][f][g] + dp[i][j][c][d][e])  % mod;
                            }
                        }
                        if(j == c){
                            if(i == 4 && dp[i][j][c][d][e]){
                                cout << i << " " << j << " " << c << " "  << d << " " << e << " "<< dp[i][j][c][d][e] << endl;
                            }
                            ans[i]  = (ans[i] + dp[i][j][c][d][e])%mod;
                        }
                    }
                }
                //dp[i+1][j+1][c] = (dp[i+1][j+1][c] + dp[i][j][c])  % mod;
                //dp[i+1][j+2][c] = (dp[i+1][j+2][c] + dp[i][j][c])  % mod;
                //dp[i+1][j][c+1] = (dp[i+1][j][c+1] + dp[i][j][c])  % mod;
                //dp[i+1][j][c+2] = (dp[i+1][j][c+2] + dp[i][j][c])  % mod;
                
            }
        }
    }*/
    int type;
    cin >> type;
    int t=1;
    cin>>t;
    while(t--){
        if(type == 1)
            solve1();
        if(type ==2)
            solve2();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• Subtask 1: 0 / 5
• Subtask 2: 11 / 11
• Subtask 3: 0 / 6
• Subtask 4: 0 / 28
• Subtask 5: 0 / 6
• Subtask 6: 0 / 16
• Subtask 7: 0 / 28