# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
589812 | 2022-07-05T10:00:08 Z | Zanite | Miners (IOI07_miners) | C++17 | 167 ms | 596 KB |
#include <bits/stdc++.h> using namespace std; const int maxN = 1e5 + 5; const int INF = 2e9; int N; int shipments[maxN]; int dp[2][4][4][4][4]; inline void chmax(int &a, int b) {a = max(a, b);} void resetDP(int i) { for (int j = 0; j < 4; j++) { for (int k = 0; k < 4; k++) { for (int l = 0; l < 4; l++) { for (int m = 0; m < 4; m++) { dp[i][j][k][l][m] = -INF; } } } } } int main() { scanf("%d", &N); char _tmp; for (int i = 1; i <= N; i++) { scanf(" %c", &_tmp); if (_tmp == 'M') {shipments[i] = 1;} else if (_tmp == 'B') {shipments[i] = 2;} else {shipments[i] = 3;} } resetDP(0); dp[0][0][0][0][0] = 0; for (int i = 0; i < N; i++) { int cur = i & 1, nxt = cur ^ 1; resetDP(nxt); for (int j = 0; j < 4; j++) { for (int k = 0; k < 4; k++) { for (int l = 0; l < 4; l++) { for (int m = 0; m < 4; m++) { int A[4] = {}, B[4] = {}; A[j]++, A[k]++, B[l]++, B[m]++; A[shipments[i+1]]++, B[shipments[i+1]]++; int X = 0, Y = 0; for (int i = 1; i <= 3; i++) { if (A[i]) X++; if (B[i]) Y++; } int D = dp[cur][j][k][l][m]; chmax(dp[nxt][k][shipments[i+1]][l][m], D + X); chmax(dp[nxt][j][k][m][shipments[i+1]], D + Y); } } } } } int ans = -INF; for (int j = 0; j < 4; j++) { for (int k = 0; k < 4; k++) { for (int l = 0; l < 4; l++) { for (int m = 0; m < 4; m++) { chmax(ans, dp[N & 1][j][k][l][m]); } } } } printf("%d\n", ans); }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 1 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 0 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 2 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 13 ms | 212 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 22 ms | 348 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 48 ms | 384 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 141 ms | 576 KB | Output is correct |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 167 ms | 596 KB | Output is correct |