另外，我猜你连题目都没读过。题目中既说“以0 0结束”又说“N…表示操作次数”，信息冗余了，“样例输入”也中没有“0 0”
程序代码：#include <stdio.h>
int main( void )
{
unsigned n;
unsigned long long x;
unsigned opt[100];
unsigned long long opd[100];
scanf( "%u%llu", &n, &x );
for( unsigned i=0; i!=n; ++i )
scanf( "%u%llu", &opt[n-i-1], &opd[n-i-1] );
for( unsigned i=0; i!=n; ++i )
{
switch( opt[i] )
{
case 1: x-=opd[i]; break;
case 2: x+=opd[i]; break;
case 3: x/=opd[i]; break;
case 4: x*=opd[i]; break;
}
}
printf( "%llu\n", x );
}