Submission #473791

#	Time	Username	Problem	Language	Result	Execution time	Memory
473791		HossamHero7	Crtanje (COCI20_crtanje)	C++14	50 / 50	2 ms	332 KiB

crtanje

#include <bits/stdc++.h>
#include <unordered_map>
using namespace std;
typedef long long ll;
typedef vector <ll> row;
typedef vector <row> matrix;
#define endl '\n'
#define fast ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define all(v) ((v).begin()), ((v).end())
#define allR(v) ((v).rbegin()), ((v).rend())
#define For(i,n) for(int i=0;i<(int)(n);i++)
#define sz(v) v.size()
#define swapS(a,b) if(a>b) swap(a,b)
const ll mod = 1e9+7;
const ll OO = 1e18;
const ll invalid = -1e18;
int dx[] = {0,0,-1,1,1,1,-1,-1};
int dy[] = {1,-1,0,0,1,-1,-1,1};
ll fixMod(ll x){
    return ((x%mod) + mod) % mod;
}
ll lcm(ll a,ll b){
    return max(a,b)/__gcd(a,b)*min(a,b);
}
ll power(ll a,ll b){
    if(b==0) return 1;
    if(b==1) return a;
    if(b&1){
        ll y=power(a,b/2);
        return (y*y*a);
    }
    else {
        ll y=power(a,b/2);
        return (y*y);
    }
}
ll inv(ll n){
    return power(n,(mod-2));
}
matrix zero(int n,int m){
    return matrix(n,row(m,0));
}
matrix identity(int n){
    matrix ret = zero(n,n);
    for(int i=0;i<n;i++){
        ret[i][i] = 1;
    }
    return ret;
}
matrix multiply(const matrix &a, const matrix &b){
    matrix ret = zero(a.size(),b[0].size());
    for(int i=0;i<a.size();i++){
        for(int k=0;k<a[0].size();k++){
            for(int j=0;j<b[0].size();j++){
                ret[i][j] += a[i][k] * b[k][j];
                ret[i][j] = ret[i][j];
            }
        }
    }
    return ret;
}
matrix matrixPower(matrix &a,ll b){
    if(b == 0) return identity(a.size());
    if(b == 1) return a;
    matrix r = matrixPower(a,b/2);
    if(b&1) return multiply(multiply(r,r),a);
    return multiply(r,r);
}
void solve(){
    int n;
    cin>>n;
    string s;
    cin>>s;
    for(int start=0;start<n;start++){
        vector <vector<char>> v(n,vector<char>(n,'.'));
        int row = start;
        for(int i=0;i<n-1;i++){
            if(row>=n || row<0) break;
            if(s[i] == '+'){
                v[row][i] = '/';
                if(s[i+1] == '+' || s[i+1] == '='){
                    row --;
                }
            }
            else if(s[i] == '-'){
                v[row][i] = '\\';
                if(s[i+1] == '-'){
                    row ++;
                }
            }
            else {
                v[row][i] = '_';
                if(s[i+1] == '-'){
                    row ++;
                }
            }
        }
        if(row>=n || row<0) continue;
        if(s.back() == '+'){
            v[row][n-1] = '/';
        }
        else if(s.back() == '-'){
            v[row][n-1] = '\\';
        }
        else {
            v[row][n-1] = '_';
        }
        ll mnI=-1;
        ll mxI=0;
        ll mnJ=-1;
        ll mxJ=0;
        for(int i=0;i<n;i++){
            bool x = 0;
            for(int j=0;j<n;j++){
                if(v[i][j] != '.') x = 1;
            }
            if(x) {
                if(mnI == -1){
                    mnI = i;
                }
                mxI = i;
            }
        }
        for(int i=0;i<n;i++){
            bool x = 0;
            for(int j=0;j<n;j++){
                if(v[j][i] != '.') x = 1;
            }
            if(x) {
                if(mnJ == -1){
                    mnJ = i;
                }
                mxJ = i;
            }
        }
        for(int i=mnI;i<=mxI;i++){
            for(int j=mnJ;j<=mxJ;j++){
                cout<<v[i][j];
            }
            cout<<endl;
        }
        return;
    }
}
int main()
{
    fast
    ll t=1;
    //cin>>t;
    while(t--){
        //Some important Notes:
        //  1- Any minus with mod fixed mod
        //  2- Any divide with mod inverse
        //  3- Any mod problem make mod in every where
        //  4- Any dp problem don't forget to return the saved value :)
        solve();
    }
    return 0;
}

Compilation message (stderr)

crtanje.cpp: In function 'matrix multiply(const matrix&, const matrix&)':
crtanje.cpp:52:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for(int i=0;i<a.size();i++){
      |                 ~^~~~~~~~~
crtanje.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for(int k=0;k<a[0].size();k++){
      |                     ~^~~~~~~~~~~~
crtanje.cpp:54:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |             for(int j=0;j<b[0].size();j++){
      |                         ~^~~~~~~~~~~~

• Subtask 1: 50 / 50