oj.uz

Submission #133961

# Submission time Handle Problem Language Result Execution time Memory
133961 2019-07-21T19:32:57 Z duality Wild Boar (JOI18_wild_boar) C++11
12 / 100
 3566 ms 1048580 KB 
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;

int N,M;
struct edge { int u,v,w; };
vector<edge> edges;
int opp(int a,int b) {
    return ((a < 2*M) && (b < 2*M) && ((a^b) == 1));
}
int X[100000];
int num;
vpii adjList[20000];
vi nodes;
int tree[1 << 12];
int build(int s,int e,int i) {
    if (s == e) {
        tree[i] = num++;
        adjList[tree[i]].pb(mp(nodes[s],edges[nodes[s]].w));
        return 0;
    }

    int mid = (s+e) / 2;
    build(s,mid,2*i+1),build(mid+1,e,2*i+2);
    tree[i] = num++;
    adjList[tree[i]].pb(mp(tree[2*i+1],0)),adjList[tree[i]].pb(mp(tree[2*i+2],0));
    return 0;
}
int add(int s,int e,int as,int ae,int i,int u) {
    if ((s > ae) || (e < as)) return 0;
    else if ((s >= as) && (e <= ae)) {
        adjList[u].pb(mp(tree[i],0));
        return 0;
    }

    int mid = (s+e) / 2;
    add(s,mid,as,ae,2*i+1,u),add(mid+1,e,as,ae,2*i+2,u);
    return 0;
}
priority_queue<pair<LLI,int> > H;
LLI dist2[20000];
LLI dist[6000][6000];
struct path { int eu,ev; LLI d; };
bool comp(path a,path b) {
    return a.d < b.d;
}
vector<path> paths[2001][2001];
int shorten(vector<path> &v) {
    sort(v.begin(),v.end(),comp);
    return 0;
}
vector<path> com(vector<path> a,vector<path> b) {
    int i,j;
    vector<path> c;
    for (i = 0; i < a.size(); i++) {
        for (j = 0; j < b.size(); j++) {
            if (a[i].ev == b[j].eu) c.pb((path){a[i].eu,b[j].ev,min(a[i].d+b[j].d,(LLI) 1e18)});
        }
    }
    shorten(c);
    return c;
}
vector<path> tree2[1 << 18];
int build2(int s,int e,int i) {
    if (s == e) {
        tree2[i] = paths[X[s-1]][X[s]];
        return 0;
    }

    int mid = (s+e) / 2;
    build2(s,mid,2*i+1),build2(mid+1,e,2*i+2);
    tree2[i] = com(tree2[2*i+1],tree2[2*i+2]);
    return 0;
}
int update2(int s,int e,int ai,int i) {
    if ((s > ai) || (e < ai)) return 0;
    else if (s == e) {
        tree2[i] = paths[X[s-1]][X[s]];
        return 0;
    }

    int mid = (s+e) / 2;
    update2(s,mid,ai,2*i+1),update2(mid+1,e,ai,2*i+2);
    tree2[i] = com(tree2[2*i+1],tree2[2*i+2]);
    return 0;
}
int main() {
    int i;
    int T,L;
    int A,B,C,P,Q;
    scanf("%d %d %d %d",&N,&M,&T,&L);
    for (i = 0; i < M; i++) {
        scanf("%d %d %d",&A,&B,&C);
        A--,B--;
        edges.pb((edge){A,B,C});
        edges.pb((edge){B,A,C});
    }
    for (i = 0; i < L; i++) scanf("%d",&X[i]),X[i]--;

    int j,k;
    for (i = 0; i < N; i++) edges.pb((edge){N,i,0});
    num = edges.size();
    for (i = 0; i <= N; i++) {
        vi v;
        for (j = 0; j < edges.size(); j++) {
            if (edges[j].u == i) nodes.pb(j);
            if (edges[j].v == i) v.pb(j);
        }
        build(0,(int) nodes.size()-1,0);
        for (j = 0; j < v.size(); j++) {
            for (k = 0; k < nodes.size(); k++) {
                if (edges[nodes[k]].v == edges[v[j]].u) break;
            }
            if (k < nodes.size()) {
                add(0,(int) nodes.size()-1,0,k-1,0,v[j]);
                add(0,(int) nodes.size()-1,k+1,(int) nodes.size()-1,0,v[j]);
            }
            else add(0,(int) nodes.size()-1,0,(int) nodes.size()-1,0,v[j]);
        }
        nodes.clear();
    }
    for (i = 0; i < edges.size(); i++) {
        for (j = 0; j < num; j++) dist2[j] = 1e18;
        dist2[i] = 0,H.push(mp(0,i));
        while (!H.empty()) {
            int u = H.top().second;
            LLI d = -H.top().first;
            H.pop();

            if (d > dist2[u]) continue;
            for (j = 0; j < adjList[u].size(); j++) {
                int v = adjList[u][j].first;
                if (d+adjList[u][j].second < dist2[v]) {
                    dist2[v] = d+adjList[u][j].second;
                    H.push(mp(-dist2[v],v));
                }
            }
        }
        for (j = 0; j < edges.size(); j++) dist[i][j] = dist2[j];
    }
    for (i = 0; i < edges.size(); i++) {
        for (j = 0; j < edges.size(); j++) paths[edges[i].v][edges[j].v].pb((path){i,j,dist[i][j]});
    }
    for (i = 0; i <= N; i++) {
        for (j = 0; j <= N; j++) shorten(paths[i][j]);
    }

    build2(1,L-1,0);
    for (i = 0; i < T; i++) {
        scanf("%d %d",&P,&Q);
        P--,Q--;
        X[P] = Q;
        if (P > 0) update2(1,L-1,P,0);
        if (P < L-1) update2(1,L-1,P+1,0);
        printf("%lld\n",(tree2[0][0].d > 1e17) ? -1:tree2[0][0].d);
    }

    return 0;
}

Compilation message

wild_boar.cpp: In function 'std::vector<path> com(std::vector<path>, std::vector<path>)':
wild_boar.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < a.size(); i++) {
                 ~~^~~~~~~~~~
wild_boar.cpp:61:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < b.size(); j++) {
                     ~~^~~~~~~~~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:110:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < edges.size(); j++) {
                     ~~^~~~~~~~~~~~~~
wild_boar.cpp:115:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < v.size(); j++) {
                     ~~^~~~~~~~~~
wild_boar.cpp:116:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (k = 0; k < nodes.size(); k++) {
                         ~~^~~~~~~~~~~~~~
wild_boar.cpp:119:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (k < nodes.size()) {
                 ~~^~~~~~~~~~~~~~
wild_boar.cpp:127:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < edges.size(); i++) {
                 ~~^~~~~~~~~~~~~~
wild_boar.cpp:136:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (j = 0; j < adjList[u].size(); j++) {
                         ~~^~~~~~~~~~~~~~~~~~~
wild_boar.cpp:144:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < edges.size(); j++) dist[i][j] = dist2[j];
                     ~~^~~~~~~~~~~~~~
wild_boar.cpp:146:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < edges.size(); i++) {
                 ~~^~~~~~~~~~~~~~
wild_boar.cpp:147:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < edges.size(); j++) paths[edges[i].v][edges[j].v].pb((path){i,j,dist[i][j]});
                     ~~^~~~~~~~~~~~~~
wild_boar.cpp:96:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d",&N,&M,&T,&L);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:98:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d",&A,&B,&C);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:103:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < L; i++) scanf("%d",&X[i]),X[i]--;
                             ~~~~~~~~~~~~~~~~~^~~~~~~
wild_boar.cpp:155:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&P,&Q);
         ~~~~~^~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 105316 KB Output is correct
2 Correct 2433 ms 397528 KB Output is correct
3 Correct 2432 ms 364736 KB Output is correct
4 Correct 422 ms 170168 KB Output is correct
5 Correct 346 ms 150604 KB Output is correct
6 Correct 658 ms 167700 KB Output is correct
7 Correct 1134 ms 217592 KB Output is correct
8 Correct 158 ms 113168 KB Output is correct
9 Correct 145 ms 113576 KB Output is correct
10 Correct 227 ms 124256 KB Output is correct
11 Correct 125 ms 108228 KB Output is correct
12 Correct 134 ms 110276 KB Output is correct
13 Correct 158 ms 113104 KB Output is correct
14 Correct 129 ms 110320 KB Output is correct
15 Correct 120 ms 104784 KB Output is correct
16 Correct 113 ms 104832 KB Output is correct
17 Correct 123 ms 107588 KB Output is correct
18 Correct 111 ms 104504 KB Output is correct
19 Correct 108 ms 104040 KB Output is correct
20 Correct 105 ms 103184 KB Output is correct
21 Correct 3566 ms 517632 KB Output is correct
22 Correct 2377 ms 517692 KB Output is correct
23 Correct 2388 ms 517776 KB Output is correct
24 Correct 2401 ms 550440 KB Output is correct
25 Correct 3561 ms 517668 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 105316 KB Output is correct
2 Correct 2433 ms 397528 KB Output is correct
3 Correct 2432 ms 364736 KB Output is correct
4 Correct 422 ms 170168 KB Output is correct
5 Correct 346 ms 150604 KB Output is correct
6 Correct 658 ms 167700 KB Output is correct
7 Correct 1134 ms 217592 KB Output is correct
8 Correct 158 ms 113168 KB Output is correct
9 Correct 145 ms 113576 KB Output is correct
10 Correct 227 ms 124256 KB Output is correct
11 Correct 125 ms 108228 KB Output is correct
12 Correct 134 ms 110276 KB Output is correct
13 Correct 158 ms 113104 KB Output is correct
14 Correct 129 ms 110320 KB Output is correct
15 Correct 120 ms 104784 KB Output is correct
16 Correct 113 ms 104832 KB Output is correct
17 Correct 123 ms 107588 KB Output is correct
18 Correct 111 ms 104504 KB Output is correct
19 Correct 108 ms 104040 KB Output is correct
20 Correct 105 ms 103184 KB Output is correct
21 Correct 3566 ms 517632 KB Output is correct
22 Correct 2377 ms 517692 KB Output is correct
23 Correct 2388 ms 517776 KB Output is correct
24 Correct 2401 ms 550440 KB Output is correct
25 Correct 3561 ms 517668 KB Output is correct
26 Runtime error 2117 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
27 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 105316 KB Output is correct
2 Correct 2433 ms 397528 KB Output is correct
3 Correct 2432 ms 364736 KB Output is correct
4 Correct 422 ms 170168 KB Output is correct
5 Correct 346 ms 150604 KB Output is correct
6 Correct 658 ms 167700 KB Output is correct
7 Correct 1134 ms 217592 KB Output is correct
8 Correct 158 ms 113168 KB Output is correct
9 Correct 145 ms 113576 KB Output is correct
10 Correct 227 ms 124256 KB Output is correct
11 Correct 125 ms 108228 KB Output is correct
12 Correct 134 ms 110276 KB Output is correct
13 Correct 158 ms 113104 KB Output is correct
14 Correct 129 ms 110320 KB Output is correct
15 Correct 120 ms 104784 KB Output is correct
16 Correct 113 ms 104832 KB Output is correct
17 Correct 123 ms 107588 KB Output is correct
18 Correct 111 ms 104504 KB Output is correct
19 Correct 108 ms 104040 KB Output is correct
20 Correct 105 ms 103184 KB Output is correct
21 Correct 3566 ms 517632 KB Output is correct
22 Correct 2377 ms 517692 KB Output is correct
23 Correct 2388 ms 517776 KB Output is correct
24 Correct 2401 ms 550440 KB Output is correct
25 Correct 3561 ms 517668 KB Output is correct
26 Runtime error 2117 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
27 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 140 ms 105316 KB Output is correct
2 Correct 2433 ms 397528 KB Output is correct
3 Correct 2432 ms 364736 KB Output is correct
4 Correct 422 ms 170168 KB Output is correct
5 Correct 346 ms 150604 KB Output is correct
6 Correct 658 ms 167700 KB Output is correct
7 Correct 1134 ms 217592 KB Output is correct
8 Correct 158 ms 113168 KB Output is correct
9 Correct 145 ms 113576 KB Output is correct
10 Correct 227 ms 124256 KB Output is correct
11 Correct 125 ms 108228 KB Output is correct
12 Correct 134 ms 110276 KB Output is correct
13 Correct 158 ms 113104 KB Output is correct
14 Correct 129 ms 110320 KB Output is correct
15 Correct 120 ms 104784 KB Output is correct
16 Correct 113 ms 104832 KB Output is correct
17 Correct 123 ms 107588 KB Output is correct
18 Correct 111 ms 104504 KB Output is correct
19 Correct 108 ms 104040 KB Output is correct
20 Correct 105 ms 103184 KB Output is correct
21 Correct 3566 ms 517632 KB Output is correct
22 Correct 2377 ms 517692 KB Output is correct
23 Correct 2388 ms 517776 KB Output is correct
24 Correct 2401 ms 550440 KB Output is correct
25 Correct 3561 ms 517668 KB Output is correct
26 Runtime error 2117 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
27 Halted 0 ms 0 KB -