Submission #9350

#TimeUsernameProblemLanguageResultExecution timeMemory
9350yukarikoUniting (kriii2_U)C11
0 / 4
0 ms1360 KiB
#include <stdio.h> //#include <windows.h> int main() { int N; int s[100001]; long long cnt; long long sum; int i; cnt = 1; sum = 0; scanf("%d",&N); for(i=0;i<N;i++) scanf("%d",s+i); for(i=0;i<N-1;i++) { sum += s[i]*s[i+1]; s[i+1] += s[i]; } for(i=N;i>=2;i--) { cnt *= i*(i-1); } cnt = cnt%1000000007; printf("%d\n",sum); printf("%d",cnt); //system("pause"); return 0; }
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