Submission #1090278

#	Time	Username	Problem	Language	Result	Execution time	Memory
1090278		Neco_arc	Misspelling (JOI22_misspelling)	C++17	100 / 100	663 ms	165516 KiB

misspelling

#include <bits/stdc++.h>
#ifdef LOCAL
#include <bits/debug.hpp>
#endif // LOCAL

#define ll long long
#define all(x) x.begin(), x.end()
#define Neco "Misspelling"
#define resp(x) sort(all(x)), x.resize(unique(all(x)) - x.begin())
#define getbit(x,i) ((x >> i)&1)
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r
#define cntbit(x) __builtin_popcountll(x)
#define fi(i, a, b) for(int i = a; i <= b; i++)
#define fid(i, a, b) for(int i = a; i >= b; i--)
#define maxn (int) 5e5 + 1

using namespace std;

const ll mod = 1e9 + 7; //972663749
const ll base = 911382323;

int n, q;
int dp[26], pre[2][maxn];
int Sum[26][2], del[maxn][26][2];
vector<pair<int, int>> P[2][maxn];

void Add(int &x, int y) {
    ll p = 1ll * x + y;
    if(p >= mod) p -= mod;
    x = p;
}

void prepare(int type) {
    multiset<int> S = {0};
    fi(i, 1, n) {
        for(auto [x, t] : P[type][i]) {
            if(t == 1) S.insert(x);
            else S.erase(S.find(x));
        }
        pre[type][i] = *S.rbegin();
    }
}

void solve()
{

    cin >> n >> q;
    fi(i, 1, q) {
        int x, y; cin >> x >> y;
        if(x == y) continue;

        int w = 1;
        if(x > y) swap(x, y), w = 0;
        P[w][x + 1].push_back({x, 1}), P[w][y + 1].push_back({x, -1});
    }

    prepare(0), prepare(1);

    fid(i, n, 1) {
        fi(c, 0, 25) fi(t, 0, 1) Add(Sum[c][t], mod - del[i][c][t]);
        fi(c, 0, 25) dp[c] = 1;

        int S = 0;
        fi(c, 0, 25) {
            Add(dp[c], S);
            Add(S, Sum[c][0]);
        }

        S = 0;
        fid(c, 25, 0) {
            Add(dp[c], S);
            Add(S, Sum[c][1]);
        }

        fi(c, 0, 25) {
            fi(t, 0, 1) {
                Add(Sum[c][t], dp[c]);
                Add(del[pre[t][i]][c][t], dp[c]);
            }
        }
    }

    int ans = 0;
    fi(i, 0, 25) Add(ans, dp[i]);
    cout << ans;

}


int main()
{

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if(fopen(Neco".inp", "r")) {
        freopen(Neco".inp", "r", stdin);
        freopen(Neco".out", "w", stdout);
    }


    int nTest = 1;
//    cin >> nTest;


    while(nTest--)
    {
        solve();
    }


    return 0;
}

Compilation message (stderr)

misspelling.cpp: In function 'int main()':
misspelling.cpp:99:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |         freopen(Neco".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
misspelling.cpp:100:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |         freopen(Neco".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 20 / 20
• Subtask 3: 29 / 29
• Subtask 4: 32 / 32
• Subtask 5: 11 / 11