oj.uz

답안 #992373

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
992373 2024-06-04T10:55:19 Z 79brue Escape Route 2 (JOI24_escape2) C++17
31 / 100
 456 ms 332116 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const ll INF = 1e18;

struct segTree{
    int minV[400002], minIdx[400002];

    void init(int i, int l, int r, int *A){
        if(l==r){
            minV[i] = A[l], minIdx[i] = l;
            return;
        }
        int m = (l+r)>>1;
        init(i*2, l, m, A);
        init(i*2+1, m+1, r, A);
        if(minV[i*2] <= minV[i*2+1]) minV[i] = minV[i*2], minIdx[i] = minIdx[i*2];
        else minV[i] = minV[i*2+1], minIdx[i] = minIdx[i*2+1];
    }

    pair<int, int> query(int i, int l, int r, int s, int e){
        if(r<s || e<l) return make_pair(INT_MAX, -1);
        if(s<=l && r<=e) return make_pair(minV[i], minIdx[i]);
        int m = (l+r)>>1;
        return min(query(i*2, l, m, s, e), query(i*2+1, m+1, r, s, e));
    }
} tree;

struct dat{
    ll x, y;
    dat(){}
    dat(ll x, ll y): x(x), y(y){}
    bool operator<(const dat &r)const{
        if(x != r.x) return x < r.x;
        return y > r.y;
    }
    bool operator<(const ll &r)const{
        return x < r;
    }
};

int n; ll T;
vector<dat> arr[100002];
vector<dat> arrRev[100002];
int sz[100002];

vector<ll> sps[100002][20], spsRev[100002][20];

struct Query{
    int l, r, idx;
    Query(){}
    Query(int l, int r, int idx): l(l), r(r), idx(idx){}
};

int q;
vector<Query> queries[100002];
ll ans[300002];

int lRecent[100002], rRecent[100002];
vector<ll> lVec[100002], rVec[100002];

int main(){
    scanf("%d %lld", &n, &T);
    for(int i=1; i<n; i++){
        int s;
        scanf("%d", &s);

        vector<dat> vec;
        vec.resize(s);
        for(int j=0; j<s; j++) scanf("%lld %lld", &vec[j].x, &vec[j].y);

        sort(vec.begin(), vec.end());
        for(int j=0; j<s; j++){
            while(!arr[i].empty() && arr[i].back().y >= vec[j].y) arr[i].pop_back();
            arr[i].push_back(vec[j]);
        }
        sz[i] = (int)arr[i].size();

        arrRev[i+1] = arr[i];
        for(dat &p: arrRev[i+1]) swap(p.x, p.y);
    }
    tree.init(1, 1, n-1, sz);

    /// sps 채우기
    for(int i=1; i<n; i++) for(int j=0; j<sz[i]; j++) sps[i][0].push_back(arr[i][j].y);
    for(int d=1; d<20; d++){
        for(int i=1; i+(1<<d)<=n; i++) for(int j=0; j<sz[i]; j++){
            ll vT = sps[i][d-1][j], vtime = vT % T; vT -= vtime;
            int nxtX = i + (1<<(d-1));
            ll nxtT;
            if(arr[nxtX].back().x >= vtime)
                nxtT = vT + sps[nxtX][d-1][lower_bound(arr[nxtX].begin(), arr[nxtX].end(), dat(vtime, INF)) - arr[nxtX].begin()];
            else nxtT = vT + T + sps[nxtX][d-1][0];
            sps[i][d].push_back(nxtT);
        }
    }

    /// spsRev 채우기
    for(int i=2; i<=n; i++) for(int j=0; j<sz[i-1]; j++) spsRev[i][0].push_back(T-arrRev[i][j].y);
    for(int d=1; d<20; d++){
        for(int i=n; i-(1<<d)>=1; i--) for(int j=0; j<sz[i-1]; j++){
            ll vT = spsRev[i][d-1][j], vtime = vT % T; vT -= vtime;
            int nxtX = i - (1<<(d-1));
            ll nxtT;
            if(arrRev[nxtX][0].x <= T - vtime)
                nxtT = vT + spsRev[nxtX][d-1][upper_bound(arrRev[nxtX].begin(), arrRev[nxtX].end(), dat(T-vtime, -INF)) - arrRev[nxtX].begin() - 1];
            else nxtT = vT + T + spsRev[nxtX][d-1][sz[nxtX-1]-1];
            spsRev[i][d].push_back(nxtT);
        }
    }

    scanf("%d", &q);
    for(int i=1; i<=q; i++){
        int l, r;
        scanf("%d %d", &l, &r);
        int minIdx = tree.query(1, 1, n-1, l, r-1).second;
        queries[minIdx].push_back(Query(l, r, i));
    }

    ll qsum = 0;
    for(int m=1; m<n; m++) qsum += ll(sz[m]) * (ll)queries[m].size();
    assert(qsum <= 200'000'000LL);

    qsum = 0;
    for(int m=1; m<n; m++){
        for(Query p: queries[m]){
            int L = p.l, R = p.r;
            if(lRecent[L] != m) qsum += sz[m], lRecent[L] = m;
            if(rRecent[R] != m) qsum += sz[m], rRecent[R] = m;
        }
    }
    assert(qsum <= 600'000);
    for(int i=1; i<=n; i++) lRecent[i] = rRecent[i] = 0;

    for(int m=1; m<n; m++){
        for(Query p: queries[m]){
            int L = p.l, R = p.r;
            if(lRecent[L] != m){
                lRecent[L] = m;
                lVec[L].clear();
                for(int i=0; i<sz[m]; i++){
                    ll nowT = T - arrRev[m+1][i].x; int diff = m+1 - L, nowX = m+1;
                    for(int j=0; j<20; j++) if((diff>>j)&1){
                        ll vtime = nowT % T, vT = nowT - vtime, nxtT;
                        if(arrRev[nowX][0].x <= T - vtime)
                            nxtT = vT + spsRev[nowX][j][upper_bound(arrRev[nowX].begin(), arrRev[nowX].end(), dat(T-vtime, -INF)) - arrRev[nowX].begin() - 1];
                        else nxtT = vT + T + spsRev[nowX][j][sz[nowX-1]-1];
                        nowT = nxtT, nowX -= 1<<j;
                    }
                    lVec[L].push_back(nowT);
                }
            }
            if(rRecent[R] != m){
                rRecent[R] = m;
                rVec[R].clear();
                for(int i=0; i<sz[m]; i++){
                    ll nowT = arr[m][i].x; int diff = R-m, nowX = m;
                    for(int j=0; j<20; j++) if((diff>>j)&1){
                        ll vtime = nowT % T, vT = nowT - vtime, nxtT;
                        if(arr[nowX].back().x >= vtime)
                            nxtT = vT + sps[nowX][j][lower_bound(arr[nowX].begin(), arr[nowX].end(), dat(vtime, INF)) - arr[nowX].begin()];
                        else nxtT = vT + T + sps[nowX][j][0];
                        nowT = nxtT, nowX += 1<<j;
                    }
                    rVec[R].push_back(nowT);
                }
            }

            ll minV = LLONG_MAX;
            for(int i=0; i<sz[m]; i++){
                minV = min(minV, lVec[L][i] - (T - arrRev[m+1][i].x) + rVec[R][i] - arr[m][i].x - (arr[m][i].y - arr[m][i].x));
            }
            ans[p.idx] = minV;
        }
    }

    for(int i=1; i<=q; i++) printf("%lld\n", ans[i]);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |     scanf("%d %lld", &n, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
Main.cpp:68:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         scanf("%d", &s);
      |         ~~~~~^~~~~~~~~~
Main.cpp:72:37: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         for(int j=0; j<s; j++) scanf("%lld %lld", &vec[j].x, &vec[j].y);
      |                                ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:114:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  114 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
Main.cpp:117:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  117 |         scanf("%d %d", &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 111196 KB Output is correct
2 Correct 65 ms 119428 KB Output is correct
3 Correct 109 ms 119892 KB Output is correct
4 Correct 153 ms 122448 KB Output is correct
5 Correct 147 ms 120080 KB Output is correct
6 Correct 145 ms 122448 KB Output is correct
7 Correct 142 ms 122740 KB Output is correct
8 Correct 112 ms 119888 KB Output is correct
9 Correct 142 ms 122648 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 111196 KB Output is correct
2 Correct 65 ms 119428 KB Output is correct
3 Correct 109 ms 119892 KB Output is correct
4 Correct 153 ms 122448 KB Output is correct
5 Correct 147 ms 120080 KB Output is correct
6 Correct 145 ms 122448 KB Output is correct
7 Correct 142 ms 122740 KB Output is correct
8 Correct 112 ms 119888 KB Output is correct
9 Correct 142 ms 122648 KB Output is correct
10 Correct 22 ms 111448 KB Output is correct
11 Correct 139 ms 120660 KB Output is correct
12 Correct 135 ms 120564 KB Output is correct
13 Correct 121 ms 120400 KB Output is correct
14 Correct 114 ms 120312 KB Output is correct
15 Correct 118 ms 120656 KB Output is correct
16 Correct 66 ms 118920 KB Output is correct
17 Correct 131 ms 121328 KB Output is correct
18 Correct 113 ms 120464 KB Output is correct
19 Correct 145 ms 121672 KB Output is correct
20 Correct 120 ms 120404 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 111196 KB Output is correct
2 Correct 65 ms 119428 KB Output is correct
3 Correct 109 ms 119892 KB Output is correct
4 Correct 153 ms 122448 KB Output is correct
5 Correct 147 ms 120080 KB Output is correct
6 Correct 145 ms 122448 KB Output is correct
7 Correct 142 ms 122740 KB Output is correct
8 Correct 112 ms 119888 KB Output is correct
9 Correct 142 ms 122648 KB Output is correct
10 Correct 316 ms 203144 KB Output is correct
11 Correct 433 ms 230996 KB Output is correct
12 Correct 435 ms 230996 KB Output is correct
13 Correct 394 ms 229200 KB Output is correct
14 Correct 439 ms 232008 KB Output is correct
15 Correct 454 ms 232016 KB Output is correct
16 Correct 327 ms 203856 KB Output is correct
17 Correct 456 ms 232020 KB Output is correct
18 Correct 271 ms 211028 KB Output is correct
19 Correct 249 ms 211028 KB Output is correct
20 Correct 259 ms 211900 KB Output is correct
21 Correct 298 ms 211792 KB Output is correct

Subtask #4
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 111196 KB Output is correct
2 Correct 65 ms 119428 KB Output is correct
3 Correct 109 ms 119892 KB Output is correct
4 Correct 153 ms 122448 KB Output is correct
5 Correct 147 ms 120080 KB Output is correct
6 Correct 145 ms 122448 KB Output is correct
7 Correct 142 ms 122740 KB Output is correct
8 Correct 112 ms 119888 KB Output is correct
9 Correct 142 ms 122648 KB Output is correct
10 Correct 22 ms 111448 KB Output is correct
11 Correct 139 ms 120660 KB Output is correct
12 Correct 135 ms 120564 KB Output is correct
13 Correct 121 ms 120400 KB Output is correct
14 Correct 114 ms 120312 KB Output is correct
15 Correct 118 ms 120656 KB Output is correct
16 Correct 66 ms 118920 KB Output is correct
17 Correct 131 ms 121328 KB Output is correct
18 Correct 113 ms 120464 KB Output is correct
19 Correct 145 ms 121672 KB Output is correct
20 Correct 120 ms 120404 KB Output is correct
21 Correct 316 ms 203144 KB Output is correct
22 Correct 433 ms 230996 KB Output is correct
23 Correct 435 ms 230996 KB Output is correct
24 Correct 394 ms 229200 KB Output is correct
25 Correct 439 ms 232008 KB Output is correct
26 Correct 454 ms 232016 KB Output is correct
27 Correct 327 ms 203856 KB Output is correct
28 Correct 456 ms 232020 KB Output is correct
29 Correct 271 ms 211028 KB Output is correct
30 Correct 249 ms 211028 KB Output is correct
31 Correct 259 ms 211900 KB Output is correct
32 Correct 298 ms 211792 KB Output is correct
33 Runtime error 343 ms 332116 KB Execution killed with signal 6
34 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 111192 KB Output is correct
2 Correct 18 ms 111196 KB Output is correct
3 Runtime error 173 ms 273236 KB Execution killed with signal 6
4 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 111196 KB Output is correct
2 Correct 65 ms 119428 KB Output is correct
3 Correct 109 ms 119892 KB Output is correct
4 Correct 153 ms 122448 KB Output is correct
5 Correct 147 ms 120080 KB Output is correct
6 Correct 145 ms 122448 KB Output is correct
7 Correct 142 ms 122740 KB Output is correct
8 Correct 112 ms 119888 KB Output is correct
9 Correct 142 ms 122648 KB Output is correct
10 Correct 22 ms 111448 KB Output is correct
11 Correct 139 ms 120660 KB Output is correct
12 Correct 135 ms 120564 KB Output is correct
13 Correct 121 ms 120400 KB Output is correct
14 Correct 114 ms 120312 KB Output is correct
15 Correct 118 ms 120656 KB Output is correct
16 Correct 66 ms 118920 KB Output is correct
17 Correct 131 ms 121328 KB Output is correct
18 Correct 113 ms 120464 KB Output is correct
19 Correct 145 ms 121672 KB Output is correct
20 Correct 120 ms 120404 KB Output is correct
21 Correct 316 ms 203144 KB Output is correct
22 Correct 433 ms 230996 KB Output is correct
23 Correct 435 ms 230996 KB Output is correct
24 Correct 394 ms 229200 KB Output is correct
25 Correct 439 ms 232008 KB Output is correct
26 Correct 454 ms 232016 KB Output is correct
27 Correct 327 ms 203856 KB Output is correct
28 Correct 456 ms 232020 KB Output is correct
29 Correct 271 ms 211028 KB Output is correct
30 Correct 249 ms 211028 KB Output is correct
31 Correct 259 ms 211900 KB Output is correct
32 Correct 298 ms 211792 KB Output is correct
33 Runtime error 343 ms 332116 KB Execution killed with signal 6
34 Halted 0 ms 0 KB -