Submission #1367297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1367297		kahoul	Trains (BOI24_trains)	C++20	Compilation error	0 ms	0 KiB

Main

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

const int mod = 1e9 + 7;
const int maxn = 1e5 + 10;
map<int, int> resp[maxn];
vector<int> resp_dp(maxn, -1);

int x[maxn];
int d[maxn];

int dp[maxn];
map<int, int> resp[maxn];

int n;

int aux(int i, int d) {
    if (i >= n) return 0;
    if (i == n - 1) return 1;
    if (resp[i].count(d)) return resp[i][d];

    return resp[i][d] = (dp[i] + aux(i + d, d)) % mod;
}

int sum (int a, int b) {
    return (((a + b) % mod) + mod) % mod;
}

int main () {
    cin >> n;

    for (int i = 0; i < n; i++) {
        cin >> d[i] >> x[i];
    }

    dp[n - 1] = 1;

    for (int i = n - 2; i >= 0; i--) {
        dp[i] = sum(sum(1, aux(i + d[i], d[i])), -aux(i + (x[i] + 1) * d[i], d[i]));
    }

    cout << dp[0] << '\n';
}

Compilation message (stderr)

Main.cpp:13:15: error: redefinition of 'std::map<int, int> resp [100010]'
   13 | map<int, int> resp[maxn];
      |               ^~~~
Main.cpp:6:15: note: 'std::map<int, int> resp [100010]' previously declared here
    6 | map<int, int> resp[maxn];
      |               ^~~~