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#include <stdio.h> long long min(long long a, long long b){ return a < b ? a : b; } int main(void){ int n; int flag = 0; long long second = 100000000; char symbol[200010] = {'\0'}; long long position[20010] = {-1}; scanf("%d", &n); scanf(" %s", symbol); for(int i = 0; i < n; i++) scanf(" %lld", &position[i]); for(int i = 0; i < n - 1; i++){ if(symbol[i] == 'R' && symbol[i + 1] == 'L'){ flag = 1; second = min(second, (position[i + 1] - position[i]) / 2); } } if(flag) printf("%lld\n", second); else printf("-1\n"); return 0; }
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