結果
問題 | No.2127 Mod, Sum, Sum, Mod |
ユーザー | woodywoody |
提出日時 | 2022-11-19 00:31:38 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 7,790 bytes |
コンパイル時間 | 3,921 ms |
コンパイル使用メモリ | 239,432 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-20 04:47:17 |
合計ジャッジ時間 | 5,304 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | RE | - |
testcase_02 | AC | 16 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 1 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 1 ms
5,376 KB |
testcase_14 | AC | 1 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 1 ms
5,376 KB |
testcase_18 | RE | - |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | RE | - |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 17 ms
5,376 KB |
testcase_23 | AC | 17 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 2 ms
5,376 KB |
testcase_26 | AC | 6 ms
5,376 KB |
testcase_27 | AC | 2 ms
5,376 KB |
testcase_28 | AC | 16 ms
5,376 KB |
testcase_29 | AC | 2 ms
5,376 KB |
ソースコード
#include<bits/stdc++.h> #include<atcoder/all> #define rep(i,b) for(int i=0;i<b;i++) #define rrep(i,b) for(int i=b-1;i>=0;i--) #define rep1(i,b) for(int i=1;i<b;i++) #define repx(i,x,b) for(int i=x;i<b;i++) #define rrepx(i,x,b) for(int i=b-1;i>=x;i--) #define fore(i,a) for(auto i:a) #define fore1(i,a) for(auto &i:a) #define rng(x) (x).begin(), (x).end() #define rrng(x) (x).rbegin(), (x).rend() #define sz(x) ((int)(x).size()) #define pb push_back #define fi first #define se second #define pcnt __builtin_popcountll using namespace std; using namespace atcoder; using ll = long long; using ld = long double; template<typename T> using mpq = priority_queue<T, vector<T>, greater<T>>; template<typename T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<typename T> bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; } template<typename T> ll sumv(const vector<T>&a){ll res(0);for(auto&&x:a)res+=x;return res;} bool yn(bool a) { if(a) {cout << "Yes" << endl; return true;} else {cout << "No" << endl; return false;}} #define dame { cout << "No" << endl; return;} #define dame1 { cout << -1 << endl; return;} #define deb(x,y) cout << x << " " << y << endl; #define debp(p) cout << p.fi << " " << p.se << endl; #define out cout << ans << endl; #define outd cout << fixed << setprecision(20) << ans << endl; #define outm cout << ans.val() << endl; #define outv fore(yans , ans) cout << yans << "\n"; #define outdv fore(yans , ans) cout << yans.val() << "\n"; #define coutv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;} #define countv2(v) fore(vy , v) cout << vy << "\n"; #define coutvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;} #define coutvm2(v) fore(vy , v) cout << vy.val() << "\n"; using pll = pair<ll,ll>;using pil = pair<int,ll>;using pli = pair<ll,int>;using pii = pair<int,int>;using pdd = pair<ld,ld>; using tp = tuple<int ,int ,int>; using vi = vector<int>;using vd = vector<ld>;using vl = vector<ll>;using vs = vector<string>;using vb = vector<bool>; using vpii = vector<pii>;using vpli = vector<pli>;using vpll = vector<pll>;using vpil = vector<pil>; using vvi = vector<vector<int>>;using vvl = vector<vector<ll>>;using vvs = vector<vector<string>>;using vvb = vector<vector<bool>>; using vvpii = vector<vector<pii>>;using vvpli = vector<vector<pli>>;using vvpll = vector<vpll>;using vvpil = vector<vpil>; using mint = modint998244353; using vm = vector<mint>; using vvm = vector<vector<mint>>; vector<int> dx={1,0,-1,0,1,1,-1,-1},dy={0,1,0,-1,1,-1,1,-1}; ll gcd(ll a, ll b) { return a?gcd(b%a,a):b;} ll lcm(ll a, ll b) { return a/gcd(a,b)*b;} #define yes {cout <<"Yes"<<endl;} #define yesr { cout <<"Yes"<<endl; return;} #define no {cout <<"No"<<endl;} #define nor { cout <<"No"<<endl; return;} const double eps = 1e-10; const ll LINF = 1001002003004005006ll; const int INF = 1001001001; #ifdef MY_LOCAL_DEBUG #define show(x) cerr<<#x<<" = "<<x<<endl #define showp(p) cerr<<#p<<" = "<<p.fi<<" : "<<p.se<<endl #define show2(x,y) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<endl #define show3(x,y,z) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<endl #define show4(x,y,z,x2) cerr<<#x<<" = "<<x<<" : "<<#y<<" = "<<y<<" : "<<#z<<" = "<<z<<" : "<<#x2<<" = "<<x2<<endl #define test(x) cout << "test" << x << endl #define showv(v) {fore(vy , v) {cout << vy << " ";} cout << endl;} #define showv2(v) fore(vy , v) cout << vy << "\n"; #define showvm(v) {fore(vy , v) {cout << vy.val() << " ";} cout << endl;} #define showvm2(v) fore(vy , v) cout << vy.val() << "\n"; #else #define show(x) #define showp(p) #define show2(x,y) #define show3(x,y,z) #define show4(x,y,z,x2) #define test(x) #define showv(v) #define showv2(v) #define showvm(v) #define showvm2(v) #endif struct math_lib{ vvl div,mul; void div_init(int n){ div.resize(n+1); mul.resize(n+1); for(ll i = 1;i <= n;i++){ for(ll j = i;j <= n;j+=i){ div[j].pb(i); mul[i].pb(j); } } return; } vl divisor(ll x){ vl res; for(ll i=1;i*i<=x;i++){ if (x%i != 0) continue; res.pb(i); if (i*i != x) res.pb(x/i); } sort(rng(res)); return res; } ll sqrt(ll x) { ll l = 0, r = ll(2e9)+1; while (l+1<r) { ll c = (l+r)/2; if (c*c <= x) l = c; else r = c; } return l; } ll logx(ll x,int a){ ll tmp=1; ll ret=0; while(tmp <= x){ if (tmp >= LLONG_MAX/a) break; tmp *= a; ret++; } ret--; return ret; } ll pow(ll x , ll a){ assert(x > 0); assert(a >= 0); ll ret = 1; rep(_,a){ assert (ret < LLONG_MAX/x); ret *= x; } return ret; } ll base(ll x,int a){ ll ans=0,y; for (ll i=0;x>0;i++){ y = x/a; ans += (x - y*a)*pow(10,i); x = y; } return ans; } string baseS(ll x,int a){ string ans; ll y; for (ll i=0;x>0;i++){ y = x/a; ans += '0' + (x - y*a); x = y; } reverse(rng(ans)); return ans; } ll inv(vl& v){ int n = sz(v); map<ll,int> mp; fore(y,v) mp[y] = 0; int m = 0; fore1(y,mp) y.se = m++; fenwick_tree<ll> fw(m); ll ret = 0; rep(i,n){ int k = mp[v[i]]; ret += fw.sum(k+1,m); fw.add(k,1); } return ret; } } math; // .div.mul : div[i]、mul[i]はそれぞれiの約数、倍数を格納している。 // .div_init(n) : div,mulを初期化。引数はnまで。n < 1e6 ~ 1e7。 // .divisor(x) : xの約数列挙。xは64bit整数。 // .sqrt(x) : floor(sqrt(x))。xは64bit整数。誤差は発生しない。 // .logx(x , a) : floor(loga(x))。xは64bit整数。誤差は発生しない。 // .pow(x , a) : x^a。誤差は発生しない。 // .base(x , a) : x(10進数)をa進数表記に。1 <= a <= 10。戻り値はll型。 // .baseS(x , a) : x(10進数)をa進数表記に。1 <= a <= 10。戻り値はstring型。 // .inv(v) : vの転倒数。 void solve(){ ll n,m; cin>>n>>m; mint ans = mint(n)*(n+1)/2 * m; chmin(m,n); mint sum = 0; ll c = (ll)sqrt(n); ll now = m; int nowi = -1; vl d; ll pre = 0; for(int i=1;i*i<=n;i++){ ll nxt = n/i; if (nxt != pre){ } } bool ok = false; rep1(j,m+1){ ll k = n/j; mint tmp = mint(n+1)*k*j - mint(j)*j*(k*(k+1)/2); sum += tmp; ll nxt = n / (j+1); if (j >= c){ now = nxt; ok = true; nowi = j+1; break; } } if (ok){ int l = now; rrep(i,l+1){ ll k = now; ll y = nowi; ll nxt = i; ll ny = n/nxt; bool ok2 = false; if (ny >= m){ ny = m; ok2 = true; } mint y1 = (y-1) * y / 2; mint y2 = mint(y) * (2*y-1) * (y - 1) / 6; mint ny1 = (ny+1) * ny / 2; mint ny2 = mint(ny) * (2*ny+1) * (ny + 1) / 6; mint tmp = mint(n+1)*k*(ny1-y1) - mint(k+1)*k/2*(ny2-y2); sum += tmp; nowi = ny+1; now = n / nowi; if (ok2){ break; } } } ans -= sum; outm; return; } int main(){ ios::sync_with_stdio(false); cin.tie(0); int t = 1; //cin>>t; rep(i,t){ solve(); } return 0; }