Submission #120558

#	Time	Username	Problem	Language	Result	Execution time	Memory
120558		_Samir	Automobil (COCI17_automobil)	C++14	100 / 100	81 ms	8312 KiB

automobil

/*
   we will use dp , our state will be left most house i visited , the right most house i visited and
   the time till now , each time will try to visit new house from the left or the right
*/
#include<queue>
#include<map>
#include <string>
#include<bits/stdc++.h>
#define pi 3.141592654
#define forr(i,a,b) for(int i=a;i<=b;i++)
#define F first
#define S second
#define input ios_base::sync_with_stdio(0);cin.tie(0);
//#define x real()
//#define y imag()
using namespace std;
typedef pair<double,double>pdd;
typedef long long  ll;
typedef pair<ll, ll>pii;
//typedef complex<double> point;
//template<typename T>T gcd(T x, T y) { if(y == 0)return x; else return gcd(y, x%y); }
//typedef bitset<30> mask;
//int x[8]={1,0,0,-1,-1,-1,1,1};
//int y[8]={0,1,-1,0,-1,1,-1,1};
//#define var(x) ((x)<<1)
//#define nvar(x) ((x)^1)
const int N=100000,M=100000;

ll n,m,k;
map<ll,ll>r,c;
ll sum,mod=1e9+7,R[1000004],pls;
 main()
{

//cout<<Pow((ll)1000000,(ll)110);
//freopen("input.txt","r",stdin);
//freopen("output.txt","w",stdout);
//    char input[15];
//    scanf("%s", &input);  array of char
//  gets(c+1);  array of char
//printf("%s, ",name[k[i]].c_str());  printf of string
//priority_queue<ll,vector<ll>,greater<ll>>y;
input;

cin>>n>>m>>k;
for(ll i=1;i<=n;i++)
{
   R[i]=((i-1)*((m*m)%mod))%mod+(m*(m+1)/2)%mod;
   R[i]%=mod;
}


char t;
ll x,y;
forr(i,1,k)
{
    cin>>t>>x>>y;
    if(t=='S')
    {
        if(c.count(x)==0)c[x]=1;
        c[x]*=y;
        c[x]%=mod;
    }
    else
    {
        if(r.count(x)==0)r[x]=1;
        r[x]*=y;
        r[x]%=mod;
    }
}

for(auto b:c)
{
    ll g =(b.F*n)%mod+(((n*(n-1)/2)%mod)*m)%mod;
    g%=mod;
    for(auto a:r)
    {
        ll num=((a.F-1)*m)%mod+b.F;
        num%=mod;
        R[a.F]-=num;
        R[a.F]=(R[a.F]+mod)%mod;
        R[a.F]+=(num*b.S)%mod;
        R[a.F]%=mod;
        g-=num;
        g=(g+mod)%mod;
    }
    pls+=((b.S-1)*g)%mod;
    pls%=mod;
}

for(auto a:r)R[a.F]=(R[a.F]*a.S)%mod;

forr(i,1,n)
    sum=((sum%mod)+(R[i]%mod))%mod;

cout<<(sum+pls)%mod;
return 0;
}

Compilation message (stderr)

automobil.cpp:32:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  main()
       ^

• Subtask 1: 100 / 100