Submission #831797

#	Time	Username	Problem	Language	Result	Execution time	Memory
831797		Kerim	Miners (IOI07_miners)	C++17	45 / 100	1573 ms	724 KiB

miners

#include "bits/stdc++.h"
#define pb(x) push_back(x)
using namespace std;
const int N = 1e5+5;
const int INF = 1e9+10;
char s[N];
int a[2], b[2];
int arr[N];
int bit[] = {0, 1, 1, 2, 1, 2, 2, 3};
int f(int x, int y, int z){
    int mask = 0;
    if (x) mask |= (1<<(x-1));
    if (y) mask |= (1<<(y-1));
    if (z) mask |= (1<<(z-1));
    return bit[mask];
}
int main(){
    // freopen("file.in", "r", stdin);
    // freopen("file.out", "w", stdout);
    int n;
    scanf("%d", &n);
    scanf("%s", s);
    for (int i = 0; i < n; i++){
        if (s[i] == 'M') arr[i] = 1;
        else if(s[i] == 'F') arr[i] = 2;
        else arr[i] = 3;
    }
    int answer = 0;
    for (int mask = 0; mask < (1<<n); mask++){
        a[0] = a[1] = 0;
        b[0] = b[1] = 0;
        int cost = 0;
        for (int i = 0; i < n; i++){
            if (mask>>i&1){
                cost += f(a[0], a[1], arr[i]);
                a[0] = a[1]; a[1] = arr[i];
            }
            else{
                cost += f(b[0], b[1], arr[i]);
                b[0] = b[1]; b[1] = arr[i];
            }
        }
        answer = max(answer, cost);
    }
    printf("%d\n", answer);
}

Compilation message (stderr)

miners.cpp: In function 'int main()':
miners.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
miners.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     scanf("%s", s);
      |     ~~~~~^~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 0 / 7
• Subtask 7: 0 / 8
• Subtask 8: 0 / 8
• Subtask 9: 0 / 8
• Subtask 10: 0 / 8
• Subtask 11: 0 / 8
• Subtask 12: 0 / 8