Created
April 19, 2020 13:17
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class Solution { | |
public: | |
int minNumberOfFrogs(string s) { | |
// c-- r-- o-- a-- k | |
int dp[5]={0}; | |
int ret=0; | |
int op=0; | |
for(auto c: s){ | |
if(c=='c'){ | |
op++; | |
dp[0]++; | |
}else if(c=='r'){ | |
if(dp[1]>=dp[0]) return -1; | |
dp[1]++; | |
}else if(c=='o'){ | |
if(dp[2]>=dp[1]) return -1; | |
dp[2]++; | |
}else if(c=='a'){ | |
if(dp[3]>=dp[2]) return -1; | |
dp[3]++; | |
}else if(c=='k'){ | |
if(dp[4]>=dp[3]) return -1; | |
dp[4]++; | |
op--; | |
}else return -1; | |
ret=max(ret,op); | |
} | |
int com=dp[0]; | |
for(int i=1;i<5;++i) | |
if(com!=dp[i]) | |
return -1; | |
return ret; | |
} | |
}; |
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