Submission #721818

#	Time	Username	Problem	Language	Result	Execution time	Memory
721818		Sharky	Catfish Farm (IOI22_fish)	C++17	9 / 100	117 ms	13620 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
using namespace std;

#define int long long

map<int, int> hv;

int f(int col) {
    if (!hv.count(col)) return 0;
    return hv[col];
}

long long max_weights(int32_t n, int32_t m, std::vector<int32_t> x, std::vector<int32_t> y, std::vector<int32_t> w) {
    int dp[n + 1][2][2], ans = 0;
    for (int i = 0; i <= n; i++) for (int j = 0; j < 2; j++) for (int k = 0; k < 2; k++) dp[i][j][k] = 0;
    for (int i = 0; i < m; i++) hv[(int) x[i]] = (int) w[i];
    for (int i = 1; i < n; i++) {
        dp[i][0][0] = max({dp[i-1][0][0], dp[i-1][1][0]});
        dp[i][1][0] = max({dp[i-1][1][1] + f(i), dp[i-1][0][1] + f(i)});
        dp[i][0][1] = max(dp[i-1][1][0], dp[i-1][0][0] + f(i-1));
        dp[i][1][1] = max(dp[i-1][1][1], dp[i-1][0][1]);
        ans = max(ans, max({dp[i][0][0], dp[i][0][1] + f(i+1), dp[i][1][1] + f(i+1), dp[i][1][0]}));
    }
    return ans;
}

#ifndef EVAL

int32_t main() {
  int32_t N, M;
  assert(2 == scanf("%d %d", &N, &M));

  std::vector<int32_t> X(M), Y(M), W(M);
  for (int32_t i = 0; i < M; ++i) {
    assert(3 == scanf("%d %d %d", &X[i], &Y[i], &W[i]));
  }

  long long result = max_weights(N, M, X, Y, W);
  printf("%lld\n", result);
  return 0;
}
#endif

• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 9 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16