Update 'cv9/snake.c'
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@ -37,7 +37,7 @@ void free_snake(struct snake* sn){
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int is_snake(struct snake* snake,int x,int y){
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struct snake* this = snake;
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while (this->next != NULL){
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while (this != NULL){
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if(this->x == x && this->y == y){
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return 1;
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