#include <stdio.h> int main() { int year = 0,month = 0,day = 0; scanf("%d %d %d",&year,&month,&day); int sum = 0; int MoistFlat[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; for(int i = 1;i < month;i++) { sum+=MoistFlat[i]; } if...