oj.uz

Submission #441986

# Submission time Handle Problem Language Result Execution time Memory
441986 2021-07-06T16:13:18 Z BeanZ One-Way Streets (CEOI17_oneway) C++14
0 / 100
 1 ms 332 KB 
// I_Love_LPL 11m
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int N = 3e5 + 5;
long long mod = 998244353;
const int lim = 4e5 + 5;
const int lg = 22;
const int base = 311;
const long double eps = 1e-6;
ll a[N], dp[N], mx[N], mem[N];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("tests.inp", "r")){
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ll n;
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
        mx[i] = max(mx[i - 1], a[i]);
        dp[i] = i;
    }
    ll ans = 0;
    ans = (mx[n] - 1) % mod;
    for (int i = (n - 1); i >= 1; i--){
        for (int j = 1; j <= n; j++){
            mem[j] = dp[j];
        }
        for (int j = 1; j <= n; j++){
            dp[j] = ((j) * mem[j] + mem[j + 1]) % mod;
            //cout << mem[j] << " ";
        }
        //cout << endl;
        ans = (ans + (a[i] - 1) * mem[mx[i - 1] + 1]) % mod;
    }
    cout << ans + 1;
}
/*
Ans:

Out:
*/

Compilation message

oneway.cpp: In function 'int main()':
oneway.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
oneway.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -