Submission #217744

#	Time	Username	Problem	Language	Result	Execution time	Memory
217744		alexandra_udristoiu	Board (CEOI13_board)	C++14	100 / 100	15 ms	896 KiB

board

#include<iostream>
#include<cstring>
#define DIM 100005
using namespace std;
int i, sol, x, y, dist, t;
int ad[DIM];
char s[DIM], p[2][DIM];
int solve(int t){
    int i, niv, n;
    long long x, y;
    cin>> s + 1;
    n = strlen(s + 1);
    niv = 0;
    for(i = 1; i <= n; i++){
        if(s[i] == '1' || s[i] == '2'){
            niv++;
            ad[niv] = s[i] - '1';
        }
        else{
            if(s[i] == 'U'){
                ad[niv - 1] += ad[niv] / 2;
                if(ad[niv] < 0 && ad[niv] % 2 != 0){
                    ad[niv - 1]--;
                }
                niv--;
            }
            else{
                if(s[i] == 'R'){
                    ad[niv]++;
                }
                else{
                    ad[niv]--;
                }
            }
        }
    }
    for(i = niv; i >= 1; i--){
        ad[i - 1] += ad[i] / 2;
        ad[i] %= 2;
        if(ad[i] == -1){
            ad[i] = 1;
            ad[i - 1]--;
        }
        p[t][i] = ad[i] + '0';
    }
    return niv;
}
int main(){
    x = solve(0);
    y = solve(1);
    sol = x + y;
    for(i = 1; i <= min(x, y); i++){
        if(p[0][i] != p[1][i]){
            break;
        }
    }
    sol -= 2 * (i - 1);
    t = p[0][i] - '0';
    if(i <= min(x, y) ){
        sol--;
    }
    for(i = i + 1; i <= min(x, y); i++){
        dist *= 2;
        if(p[t][i] == '0'){
            dist++;
        }
        if(p[1 - t][i] == '1'){
            dist++;
        }
        sol = min(sol, dist + 1 + x - i + y - i);
        if(dist > 200000){
            break;
        }
    }
    cout<< sol;
}

Compilation message (stderr)

board.cpp: In function 'int solve(int)':
board.cpp:11:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     cin>> s + 1;
           ~~^~~
board.cpp:10:15: warning: unused variable 'x' [-Wunused-variable]
     long long x, y;
               ^
board.cpp:10:18: warning: unused variable 'y' [-Wunused-variable]
     long long x, y;
                  ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10