Submission #1117449

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117449		trinhvtuan	Miners (IOI07_miners)	C++17	100 / 100	344 ms	844 KiB

miners

#include <bits/stdc++.h>
using namespace std;
int c,d,x,y,z,n,kq;
int i,j,k;
typedef pair<int,int>i2;
string s;
int a[200005],dp[3][4][4][4][4];
int main()
{
//    freopen("MINERS.INP", "r" ,stdin);
//    freopen("MINERS.OUT", "w" ,stdout);
//    freopen("tongab.inp", "r" ,stdin);
//    freopen("tongab.txt", "w" ,stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin>>n;
    cin>>s; s='0'+s;
    for (int i=1;i<=n;i++)
    if (s[i]=='M') a[i]=1; else
    if (s[i]=='B') a[i]=2; else a[i]=3;
    for (int rep=1;rep<=n;rep++)
    {
        x=1; y=0;
        if (rep>1) k=1; else k=0;
        for (int x1=0;x1<=3;x1++)
        for (int x2=0;x2<=3;x2++)
        for (int y1=0;y1<=3;y1++)
        for (int y2=0;y2<=3;y2++)
        {
            if (dp[y][x1][x2][y1][y2]==0 && rep>1) continue;
            if (rep==1 && (x1!=0 || x2!=0 || y1!=0 || y2!=0)) continue;
            vector<int>b; int d=0;
            b.push_back(x1);
            b.push_back(x2);
            b.push_back(a[rep]);
            sort(b.begin(),b.end());
            d=1;
            for (int i=1;i<b.size();i++)
            if (b[i]!=b[i-1]) d++;
            if (b[0]==0) d--;
            c=dp[y][x1][x2][y1][y2]+d;
            dp[x][x2][a[rep]][y1][y2]=max(dp[x][x2][a[rep]][y1][y2],c);
            b.clear();
            b.push_back(y1);
            b.push_back(y2);
            b.push_back(a[rep]);
            sort(b.begin(),b.end());
            d=1;
            for (int i=1;i<b.size();i++)
            if (b[i]!=b[i-1]) d++;
            if (b[0]==0) d--;
            c=dp[y][x1][x2][y1][y2]+d;
            dp[x][x1][x2][y2][a[rep]]=max(dp[x][x1][x2][y2][a[rep]],c);
            b.clear();
        }
        for (int x1=0;x1<=3;x1++)
        for (int x2=0;x2<=3;x2++)
        for (int y1=0;y1<=3;y1++)
        for (int y2=0;y2<=3;y2++)
        {
            dp[y][x1][x2][y1][y2]=dp[x][x1][x2][y1][y2];
            if (rep==n) kq=max(kq,dp[y][x1][x2][y1][y2]);
            dp[x][x1][x2][y1][y2]=0;
        }
    }
    cout<<kq;
}

Compilation message (stderr)

miners.cpp: In function 'int main()':
miners.cpp:38:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |             for (int i=1;i<b.size();i++)
      |                          ~^~~~~~~~~
miners.cpp:49:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |             for (int i=1;i<b.size();i++)
      |                          ~^~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 7 / 7
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 8 / 8
• Subtask 10: 8 / 8
• Subtask 11: 8 / 8
• Subtask 12: 8 / 8