CodeForces 707A Brain's Photos (水题)

题意：给一张照片的像素，让你来确定是黑白的还是彩色的。

析：很简单么，如果有一种颜色不是黑白灰，那么就一定是彩色的。

代码如下：

#pragma comment(linker, "/STACK:1024000000,1024000000")
#include <cstdio>
#include <string>
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <cstring>
#include <set>
#include <queue>
#include <algorithm>
#include <vector>
#include <map>
#include <cctype>
#include <stack>
using namespace std ;

typedef long long LL;
typedef pair<int, int> P;
const int INF = 0x3f3f3f3f;
const double inf = 0x3f3f3f3f3f3f;
const double PI = acos(-1.0);
const double eps = 1e-10;
const int maxn = 2e5 + 5;
const int mod = 1e9 + 7;
const char *mark = "+-*";
const int dr[] = {-1, 0, 1, 0};
const int dc[] = {0, 1, 0, -1};
int n, m;
inline int Min(int a, int b){ return a < b ? a : b; }
inline int Max(int a, int b){ return a > b ? a : b; }
inline LL Min(LL a, LL b){ return a < b ? a : b; }
inline LL Max(LL a, LL b){ return a > b ? a : b; }
inline bool is_in(int r, int c){
    return r >= 0 && r < n && c >= 0 && c < m;
}

int main(){
    while(scanf("%d %d", &n, &m) == 2){
        char s[10];
        int cnt1 = 0, cnt2 = 0;
        for(int i = 0; i < n; ++i){
            for(int j = 0; j < m; ++j){
                scanf("%s", s);
                if(s[0] == 'B' || s[0] == 'G' || s[0] == 'W')  ++cnt1;
                else ++cnt2;
            }
        }
        if(cnt2)  puts("#Color");
        else puts("#Black&White");
    }
    return 0;
}