Submission #872083

#	Time	Username	Problem	Language	Result	Execution time	Memory
872083		winter0101	Misspelling (JOI22_misspelling)	C++14	100 / 100	2182 ms	304428 KiB

misspelling

#include <bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
#define pil pair<int,long long>
const long long du = 1e9 + 7;
const int maxn = 5e5 + 9;
long long f[maxn][26];
pii a[maxn];
long long pf[maxn][26];
vector<int>add1[maxn], del1[maxn], add2[maxn], del2[maxn];
signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("temp.INP","r",stdin);
    //freopen("temp.OUT","w",stdout);
    int n, m;
    cin >> n >> m;
    for1(i, 1, m)cin >> a[i].fi >> a[i].se;
    for1(j, 0, 25)f[1][j] = pf[1][j] = 1;
    multiset<int>sml, grt;
    sml.insert(0);
    grt.insert(0);
    for1(i, 1, m) {
        if (a[i].fi < a[i].se) {
            add1[a[i].fi].pb(a[i].fi);
            del1[a[i].se].pb(a[i].fi);
        } else {
            add2[a[i].se].pb(a[i].se);
            del2[a[i].fi].pb(a[i].se);
        }
    }
    for1(i, 1, 1) {
        for (auto v : add1[i])
            sml.insert(v);

        for (auto v : add2[i])
            grt.insert(v);

        for (auto v : del1[i])
            sml.erase(sml.find(v));

        for (auto v : del2[i])
            grt.erase(grt.find(v));
    }
    for1(i, 2, n) {
        for1(j, 0, 25) {
            for1(k, 0, 25) {
                if (j == k)
                    continue;

                if (j < k) {
                    auto it = sml.end();
                    it--;
                    f[i][k] = (f[i][k] + pf[i - 1][j] - pf[(*it)][j] + 2 * du) % du;
                } else {
                    auto it = grt.end();
                    it--;
                    f[i][k] = (f[i][k] + pf[i - 1][j] - pf[(*it)][j] + 2 * du) % du;
                }
            }
        }

        for (auto v : del1[i])
            sml.erase(sml.find(v));

        for (auto v : del2[i])
            grt.erase(grt.find(v));

        for (auto v : add1[i])
            sml.insert(v);

        for (auto v : add2[i])
            grt.insert(v);

        for1(j, 0, 26)pf[i][j] = (pf[i - 1][j] + f[i][j]) % du;
    }
    long long ans = 0;
    for1(i, 1, n)for1(j, 0, 25)ans = (ans + f[i][j]) % du;
    cout << ans;
}

Compilation message (stderr)

misspelling.cpp: In function 'int main()':
misspelling.cpp:88:46: warning: iteration 26 invokes undefined behavior [-Waggressive-loop-optimizations]
   88 |         for1(j, 0, 26)pf[i][j] = (pf[i - 1][j] + f[i][j]) % du;
      |                                   ~~~~~~~~~~~^
misspelling.cpp:7:34: note: within this loop
    7 | #define for1(i,j,k) for(int i=j;i<=k;i++)
......
   88 |         for1(j, 0, 26)pf[i][j] = (pf[i - 1][j] + f[i][j]) % du;
      |              ~~~~~~~~             
misspelling.cpp:88:9: note: in expansion of macro 'for1'
   88 |         for1(j, 0, 26)pf[i][j] = (pf[i - 1][j] + f[i][j]) % du;
      |         ^~~~

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