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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
29 lines
497 B
C
29 lines
497 B
C
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#include <stdio.h>
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#include <string.h>
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int main(int argc,char* argv[])
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{
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char mark[256], seq[100099];
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memset (mark,0,256);
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int i, idx =0;
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for (i=0;i<10000;i++)
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{
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char k;
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k=getchar();
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if(k=='\n')
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break;
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mark[k]++;
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seq[idx] = k;
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idx++;
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}
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for(i=0;i<idx;i++)
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if (mark[seq[i]]==1)
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{
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printf("%c",seq[i]);
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break;
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}
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if (i==idx)
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puts("no");
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return 0;
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}
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