水题－Codeforces Round #369 Div.2-A

A. Bus to Udayland
time limit per test2 seconds
memory limit per test256 megabytes
inputstandard input
outputstandard output
ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has n rows of seats. There are 4 seats in each row, and the seats are separated into pairs by a walkway. When ZS and Chris came, some places in the bus was already occupied.

ZS and Chris are good friends. They insist to get a pair of neighbouring empty seats. Two seats are considered neighbouring if they are in the same row and in the same pair. Given the configuration of the bus, can you help ZS and Chris determine where they should sit?

Input
The first line of the input contains a single integer n (1 ≤ n ≤ 1000) — the number of rows of seats in the bus.

Then, n lines follow. Each line contains exactly 5 characters, the first two of them denote the first pair of seats in the row, the third character denotes the walkway (it always equals ‘|’) and the last two of them denote the second pair of seats in the row.

Each character, except the walkway, equals to ‘O’ or to ‘X’. ‘O’ denotes an empty seat, ‘X’ denotes an occupied seat. See the sample cases for more details.

Output
If it is possible for Chris and ZS to sit at neighbouring empty seats, print “YES” (without quotes) in the first line. In the next n lines print the bus configuration, where the characters in the pair of seats for Chris and ZS is changed with characters ‘+’. Thus the configuration should differ from the input one by exactly two charaters (they should be equal to ‘O’ in the input and to ‘+’ in the output).

If there is no pair of seats for Chris and ZS, print “NO” (without quotes) in a single line.

If there are multiple solutions, you may print any of them.

Examples
input
6
OO|OX
XO|XX
OX|OO
XX|OX
OO|OO
OO|XX
output
YES
++|OX
XO|XX
OX|OO
XX|OX
OO|OO
OO|XX
input
4
XO|OX
XO|XX
OX|OX
XX|OX
output
NO
input
5
XX|XX
XX|XX
XO|OX
XO|OO
OX|XO
output
YES
XX|XX
XX|XX
XO|OX
XO|++
OX|XO
Note
Note that the following is an incorrect configuration for the first sample case because the seats must be in the same pair.

O+|+X

XO|XX

OX|OO

XX|OX

OO|OO

OO|XX

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题意：
找到那堆输入里连续两个O，替换成++，若没有就输出NO，有则输出YES和替换后的图。

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题解：
太水。

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//
//  main.cpp
//  cf-369-2-1
//
//  Created by 袁子涵 on 16/8/29.
//  Copyright © 2016年 袁子涵. All rights reserved.
//

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

using namespace std;
const int MAXN=1005;
int n;
char a[MAXN],b[MAXN],c[MAXN],d[MAXN];
int main(int argc, const char * argv[]) {
    bool flag=0;
    cin >> n;
    for (int i=1; i<=n; i++) {
        cin >> a[i] >> b[i] >> c[i] >> c[i] >> d[i];
        if (!flag) {
            if (a[i]==b[i] && a[i]=='O') {
                flag=1;
                a[i]=b[i]='+';
            }
            else if (c[i]==d[i] && c[i]=='O')
            {
                flag=1;
                c[i]=d[i]='+';
            }
        }
    }
    if (flag) {
        puts("YES");
        for (int i=1; i<=n; i++) {
            cout << a[i] << b[i] << '|' << c[i] << d[i] << endl;
        }
    }
    else
        puts("NO");
    return 0;
}