Submission #392063

#	Time	Username	Problem	Language	Result	Execution time	Memory
392063		tmbao	Pinball (JOI14_pinball)	C++14	0 / 100	1 ms	296 KiB

pinball

#include<bits/stdc++.h>
using namespace std;
void solve(vector<tuple<int,int,int,int>> t,int w){
    vector<unsigned long long> dpL;
    vector<unsigned long long> dpR;
    dpR.resize(w);
    for(int i=0;i<w;i++){
        dpR[i]=314159265358979323;
        dpL.push_back(27182818284590452);
    }
    dpR[w-1]=0;
    dpL[0]=0;
    int a,b,c;
    unsigned long long sc=9494639522473719;
    unsigned long long d,e,f;
    tie(a,b,c,d)=t.back();
    while(a>0 & b+1<w & t.size()>0){
        t.pop_back();
        tie(a,b,c,d)=t.back();
    }
    unsigned long long luigi;
    while(!t.empty()){
        tie(a,b,c,d)=t.back();
        t.pop_back();
        luigi=7105079227968925;
        for(int i=b;i>=a;i--){
            luigi=min(luigi,dpR[i]);
            sc=min(sc,dpL[i]+luigi+d);
        }
        // dpL[x] + dpR[y] for all x <= y
        //
        e=dpL[c];
        f=dpR[c];
        for(int i=a;i<=b;i++){
            e=min(e,dpL[i]+d);
            f=min(f,dpR[i]+d);
        }
        dpL[c]=e;
        dpR[c]=f;
    }
    if(sc>1234567890101112){
        printf("-1");
    }else{
        printf("%llu",sc);
    }
}

int main(){
    //freopen("yeet.txt","r",stdin);
    int a,b,c,d,N,t;
    int h=0;
    int l=314159;
    scanf("%d %d",&N,&t);
    vector<int> fapple_pencil;
    unordered_set<int> mario;
    unordered_map<int,int> cyclamic_acid;
    vector<tuple<int,int,int,int>> grid;
    for(int i=0;i<N;i++){
        scanf("%d %d %d %d",&a,&b,&c,&d);
        a--;b--;c--;
        if(!mario.count(a)){
            fapple_pencil.push_back(a);
            mario.insert(a);
        }
        if(!mario.count(b)){
            fapple_pencil.push_back(b);
            mario.insert(b);
        }
        if(!mario.count(c)){
            fapple_pencil.push_back(c);
            mario.insert(c);
        }
        grid.push_back({a,b,c,d});
        h=max(max(h,a),max(b,c));
        l=min(min(l,a),min(b,c));
    }
    if(t>h+1 | l>1){
        printf("-1");
        return 0;
    }
    if(h>mario.size()){
        sort(fapple_pencil.begin(),fapple_pencil.end());
        vector<tuple<int,int,int,int>> electricity;
        for(int i=1;i<fapple_pencil.size();i++){
            cyclamic_acid[fapple_pencil[i]]=i;
        }
        cyclamic_acid[fapple_pencil[0]]=0;
        fapple_pencil.clear();
        while(!grid.empty()){
            tie(a,b,c,d)=grid.back();
            electricity.push_back({cyclamic_acid[a],cyclamic_acid[b],cyclamic_acid[c],d});
            grid.pop_back();
        }
        fapple_pencil.clear();
        solve(electricity,mario.size());
    }else{
        fapple_pencil.clear();
        reverse(grid.begin(),grid.end());
        solve(grid,h+1);
    }
}

Compilation message (stderr)

pinball.cpp: In function 'void solve(std::vector<std::tuple<int, int, int, int> >, int)':
pinball.cpp:17:12: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   17 |     while(a>0 & b+1<w & t.size()>0){
      |           ~^~
pinball.cpp:17:33: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   17 |     while(a>0 & b+1<w & t.size()>0){
      |                         ~~~~~~~~^~
pinball.cpp: In function 'int main()':
pinball.cpp:77:9: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses]
   77 |     if(t>h+1 | l>1){
      |        ~^~~~
pinball.cpp:81:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::unordered_set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     if(h>mario.size()){
      |        ~^~~~~~~~~~~~~
pinball.cpp:84:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         for(int i=1;i<fapple_pencil.size();i++){
      |                     ~^~~~~~~~~~~~~~~~~~~~~
pinball.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   53 |     scanf("%d %d",&N,&t);
      |     ~~~~~^~~~~~~~~~~~~~~
pinball.cpp:59:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   59 |         scanf("%d %d %d %d",&a,&b,&c,&d);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49