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solution.c
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solution.c
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#include <limits.h>
int minDifference(int* nums, int numsSize) {
if (numsSize <= 4) return 0;
int maxA = INT_MIN;
int maxB = INT_MIN;
int maxC = INT_MIN;
int maxD = INT_MIN;
int minA = INT_MAX;
int minB = INT_MAX;
int minC = INT_MAX;
int minD = INT_MAX;
for (int i = numsSize - 1; i >= 0; --i) {
if (nums[i] > maxA) {
maxD = maxC;
maxC = maxB;
maxB = maxA;
maxA = nums[i];
} else if (nums[i] > maxB) {
maxD = maxC;
maxC = maxB;
maxB = nums[i];
} else if (nums[i] > maxC) {
maxD = maxC;
maxC = nums[i];
} else if (nums[i] > maxD) {
maxD = nums[i];
}
if (nums[i] < minA) {
minD = minC;
minC = minB;
minB = minA;
minA = nums[i];
} else if (nums[i] < minB) {
minD = minC;
minC = minB;
minB = nums[i];
} else if (nums[i] < minC) {
minD = minC;
minC = nums[i];
} else if (nums[i] < minD) {
minD = nums[i];
}
}
if (maxA - minD < maxB - minC) {
if (maxA - minD < maxC - minB) {
if (maxA - minD < maxD - minA) {
return maxA - minD;
} else {
return maxD - minA;
}
} else {
if (maxC - minB < maxD - minA) {
return maxC - minB;
} else {
return maxD - minA;
}
}
} else {
if (maxB - minC < maxC - minB) {
if (maxB - minC < maxD - minA) {
return maxB - minC;
} else {
return maxD - minA;
}
} else {
if (maxC - minB < maxD - minA) {
return maxC - minB;
} else {
return maxD - minA;
}
}
}
}