Submission #123192

#	Time	Username	Problem	Language	Result	Execution time	Memory
123192		Hideo	Paint By Numbers (IOI16_paint)	C++14	32 / 100	2 ms	504 KiB

paint

#include <bits/stdc++.h>
#include "paint.h"
//#include "grader.cpp"

using namespace std;

const int N = 2e5 + 7;

int a[N], b[N], pr[N], sf[N];
int n;

std::string ans;

std::string solve_puzzle(std::string s, std::vector<int> c) {
    n = c.size();
    for (int i = 0; i < n; i++){
        a[i + 1] = c[i];
        pr[i + 1] = pr[i] + c[i] + 1;
    }
    if (pr[n] - 1 == s.size()){
        int ct = 1;
        for (int i = 1; i <= s.size(); i++){
            if (i == pr[ct]){
                ans += '_';
                ct++;
            }
            else
                ans += 'X';
        }
        return ans;
    }
    for (int i = n; i >= 1; i--)
        sf[i] = sf[i + 1] + a[i] + 1;

    for (int i = 1; i <= n; i++){
        int r1, l2;
        r1 = pr[i - 1] + a[i];
        l2 = s.size() - sf[i] + 2;
        for (int j = l2; j <= r1; j++){
            b[j] = 1;
        }
    }
    for (int i = 1; i <= s.size(); i++){
        if (b[i] == 1)
            ans += 'X';
        else
            ans += '?';
    }
    return ans;
}

Compilation message (stderr)

paint.cpp: In function 'std::__cxx11::string solve_puzzle(std::__cxx11::string, std::vector<int>)':
paint.cpp:20:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (pr[n] - 1 == s.size()){
         ~~~~~~~~~~^~~~~~~~~~~
paint.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 1; i <= s.size(); i++){
                         ~~^~~~~~~~~~~
paint.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 1; i <= s.size(); i++){
                     ~~^~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 3 / 3
• Subtask 3: 22 / 22
• Subtask 4: 0 / 27
• Subtask 5: 0 / 21
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10