Submission #1066768

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066768		KasymK	Miners (IOI07_miners)	C++17	100 / 100	274 ms	118356 KiB

miners

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 1e5+5;
int a[N], dp[N][4][4][4][4], n;
string s;

int val(vector<int> v){
    int o = 0, o_ = 0, o__ = 0;
    for(int &i : v){
        if(i == 1)
            o = 1;
        else if(i == 2)
            o_ = 1;
        else if(i == 3)
            o__ = 1;
    }
    return (o+o_+o__);
}

int f(int x, int a1, int a2, int b1, int b2){
    if(x == n)
        return 0;
    int &res = dp[x][a1][a2][b1][b2];
    if(~res)
        return res;
    int m1 = val({a1, a2, a[x]});
    int m2 = val({b1, b2, a[x]});
    return res = max(f(x+1, a[x], a1, b1, b2)+m1, f(x+1, a1, a2, a[x], b1)+m2);
}

int main(){
    memset(dp, -1, sizeof dp);
    scanf("%d", &n);
    cin >> s;
    for(int i = 0; i < n; ++i){
        if(s[i] == 'M')
            a[i] = 1;
        else if(s[i] == 'B')
            a[i] = 2;
        else
            a[i] = 3;
    }
    int answer = f(0, 0, 0, 0, 0);
    printf("%d\n", answer);
    return 0;
}

Compilation message (stderr)

miners.cpp: In function 'int main()':
miners.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~

• 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